1. A cutter head for a mining machine, the cutter head comprising:a drum including a first end, a second end, and an outer surface, the drum rotatable about a drum axis extending between the first end and the second end;
a vane coupled to the outer cylindrical surface extending away from the drum axis;
a cutting bit assembly positioned adjacent the vane, the cutting bit assembly including a bit and a holder block, the bit including a tip portion and a shank portion, the shank portion received within the holder block along a central axis, the holder block including a forward end adjacent the tip portion, a rear end opposite the forward end, and a transverse opening positioned between the forward end and the rear end, the transverse opening permitting access to a rear end of the shank portion, the holder block further including a rear opening; and
a gusset coupled to the vane and spaced from the rear end of the holder block,
wherein when the bit is broken, a portion of the bit is removable from the holder block through the rear opening and between the rear end of the holder block and the gusset; and
wherein the gusset includes a front surface terminating at an edge positioned away from the vane, and wherein the edge of the front surface of the gusset is positioned between the central axis and the vane.

1. A device for a tensioning mechanism of a conveyor system, the conveyor system including a continuous belt and a first carriage coupled to a drive unit and supported for movement, the device comprising:an anchor structure; and
a second carriage including at least one second roll for supporting a portion of the belt, the second carriage being securable to the anchor structure, a distance between the first carriage and the second carriage defining a take-up length,
when the second carriage is unsecured with respect to the anchor structure, a tension in the belt causes the second carriage to move relative to the anchor structure between a first position and at least one second position, movement of the second carriage modifying the take-up length.

1. A tool for installing and removing a bit sleeve with respect to a bore of a bit block, the bit sleeve including a shank and a bore for receiving a bit, the bit block bore defining a bore width, the tool comprising:an actuator assembly including a cylinder and a ram, the cylinder including an internal chamber supporting the ram and configured to be in fluid communication with a fluid source, the cylinder including a first end, a second end, and a reaction surface positioned proximate the first end, the reaction surface configured to contact an end of the sleeve, the ram movable relative to the cylinder and positioned adjacent the second end of the cylinder, the actuator assembly including a bore extending through the cylinder and the ram;
a rod including a first end and a second end, the rod defining a rod axis extending between the first end and the second end, the rod extending through the bore of the actuator assembly, a portion of the rod configured to extend through the bore of the bit sleeve such that the first end is positioned adjacent an end surface of the shank, the second end of the rod positioned adjacent the ram;
a first nut selectively coupled to one of the first end of the rod and the second end of the rod, the first nut defining a first dimension configured to be larger than the bore width of the bit block; and
a second nut selectively coupled to the other of the first end of the rod and the second end of the rod, the second nut defining a second dimension configured to be less than the bore width.

16. A rock excavating device comprising:a shaft including a first portion and a second portion, the first portion supported for free rotation about a first axis, rotation of the first portion changing an orientation of the second portion; and
a cutting element including a cutting edge having a leading portion and a trailing portion spaced apart from the leading portion, the cutting element supported on the second portion and rotatable about a second axis oriented obliquely relative to the first axis, reaction forces exerted on the cutting edge inducing a moment driving rotation of the first portion of the shaft about the first axis, thereby re-orienting the leading portion of the cutting edge to engage a rock surface.

8. A method of controlling a fluid delivery system for a longwall shearer system, the method comprising:determining, a measure of a capacity parameter, the capacity parameter corresponding to a position of a shearer along a mineral face and indicating an approximate amount of mineral that is being mined at a particular time;
determining, with an electronic processor, a model fluid flow based on the measure of the capacity parameter;
setting, with the electronic processor, a parameter of a flow control device based on the model fluid flow, the flow control device being in fluid communication with a nozzle positioned on a cutter drum of the shearer, and with a fluid source; and
operating, via the electronic processor, the flow control device at the set parameter to spray fluid, via the nozzle.

1. A track for a crawler traction system, the track being driven in a direction of travel by a sprocket to move over a support surface, the sprocket having a plurality of teeth, the track comprising:a first link including,
a first end,
a second end spaced apart from the first end along the direction of travel,
a first surface positioned between the first end and the second end, the first surface engaging the support surface,
a second surface positioned between the first end and the second end, the second surface facing in a direction substantially opposite the first surface,
at least one first opening extending through the first link between the first surface and the second surface, the first opening being operable to receive a sprocket tooth,
a plurality of first lugs protruding from the first end,
a plurality of second lugs protruding from the second end,
at least one transverse grouser positioned on the first surface adjacent one of the first end and the second end, each transverse grouser positioned on the first surface being oriented in a direction substantially perpendicular to the direction of travel of the track; and
a second link including,
a first end,
a second end spaced apart from the first end of the second link along the direction of travel,
a first surface positioned between the first end of the second link and the second end of the second link, the first surface engaging the support surface,
a second surface positioned between the first end of the second link and the second end of the second link, the second surface facing in a direction substantially opposite the first surface of the second link,
at least one second opening extending through the second link between the first surface of the second link and the second surface of the second link, the second opening being operable to receive a sprocket tooth,
a plurality of first lugs protruding from the first end of the second link,
a plurality of second lugs protruding from the second end of the second link,
at least one angled grouser positioned on the first surface of the second link between the first end and the second end, the angled grouser oriented in a direction that is oblique with respect to the direction of travel of the track.

7. A method for detecting face creep of a longwall mining system, the method comprising:detecting, by a detection device, a position of a beam stage loader-armored face conveyor interface based on a first signal from a first indicator device;
detecting, by the detection device, a position of a belt conveyor based on a signal from a belt conveyor indicator device;
determining, by a controller coupled to the detection device, the position of the beam stage loader-armored face conveyor interface based on an output from the detection device;
determining, by the controller, the position of the belt conveyor;
determining, by the controller, a first distance between the position of the beam stage loader-armored face conveyor interface and a maingate line;
determining a second distance between the belt conveyor and the maingate line; and
generating, by the controller, an indication of face creep based on the first distance and the second distance.

1. A conveyor support comprising:a frame including a support arm;
a roller including a shaft and a shell supported for rotation relative to the shaft, the shaft including an end; and
a retainer for releasably securing the end of the shaft relative to the support arm, the retainer including a first portion engaging a first side of the support arm and a second portion engaging a second side of the support arm, the second portion biased toward the first portion to exert a compressive force on the support arm, at least one of the first portion and the second portion engaging the shaft of the roller, an opening extending through the first portion and the second portion to receive the shaft, a portion of the shaft extending through the opening.

1. A flight for a link of a chain conveyor, the flight comprising:a flight core secured to an end of at least one pin, the flight core defining a first side and a second side and further including an opening extending between the first side and the second side; and
an encapsulation at least partially surrounding the flight core, the encapsulation filling the opening in the flight core.

1. A method of monitoring a longwall shearing mining machine in a longwall mining system, the shearing mining machine including a shearer having a first cutter drum and a second cutter drum, the method comprising:receiving, by an electronic processor, shearer position data including information obtained from sensors regarding at least one of a group consisting of a position of the shearer, a position of the first cutter drum, and a position of the second cutter drum;
identifying, by the electronic processor, from the shearer position data, profile data obtained over a current shear cycle;
accessing, by the electronic processor, profile data obtained over a previous shear cycle;
comparing, by the electronic processor, the profile data of the previous shear cycle to the profile data of the current shear cycle; and
generating an alert based on the comparison between the profile data of the previous shear cycle and the profile data of the current shear cycle.

1. A system for connecting a vehicle to an overhead power structure, the system comprising:a chassis;
a cable for transmitting electrical power from the overhead power structure to the chassis, the cable having a first end mechanically and electrically coupled to the chassis and a second end configured to mechanically and electrically connect to the overhead power structure;
a connector coupled to the chassis and receiving the first end of the cable;
a sensor for detecting a condition of the cable; and
a control system capable of interrupting a flow of power to the chassis if the sensed condition exceeds a predetermined threshold.

1. A conveyor comprising:a belt for carrying material in a direction of travel;
a support system supporting at least a portion of the belt, the support system including a first end spaced apart from a second end by a gap extending along the direction of travel; and
a bridge for supporting a portion of the belt moving between the first end and the second end, the bridge extending across the gap between the first end and the second end, the bridge being movable relative to at least one of the first end and the second end in a direction parallel to the direction of travel.

1. A cutting device for cutting rock, the cutting device comprising:a disc rotating about an axis of rotation, the disc including a peripheral edge;
a plurality of cutting elements secured to the disc, the cutting elements spaced apart from one another along the peripheral edge of the disc; and
a plurality of wear elements secured to the disc, the wear elements spaced apart from one another and from the cutting elements, the wear elements being constructed from a material having a hardness greater than a hardness of the cutting elements.

1. A system for guiding movement of a chassis of a mining machine along a rack, the system comprising:a shoe configured to be coupled to the chassis and slidably engage the rack, the shoe configured to extend at least partially around the rack, the shoe including a first end, a second end, an inner surface, and an outer surface, at least a portion of the inner surface configured to be positioned adjacent the rack; and
a fluid line for receiving a fluid from a fluid source, the fluid line including an outlet positioned proximate the shoe for dispensing the fluid at an interface between the shoe and the rack to increase lubrication between the shoe and the rack.

1. A braking device for a conveyor system, the conveyor system including a continuous belt driven in a direction of travel, the braking device comprising:a carriage movable in a direction substantially parallel to the direction of travel of the belt, the carriage including a plurality of rolls and at least one return pulley, the plurality of rolls configured to support a portion of the belt; and
a brake configured to selectively retard rotation of a brake pulley supporting a portion of the belt extending from carriage.

1. A link for a track for a mining machine, the track being driven in a direction of travel by a sprocket to move the mining machine over a support surface, the sprocket having a plurality of teeth, the link comprising:a pad defining a first surface engaging the support surface, a second surface opposite the first surface, a first end, and a second end spaced apart from the first end along the direction of travel, the pad defining at least one opening extending through the pad between the first surface and the second surface, the opening being operable to receive a sprocket tooth;
a first set of lugs extending away from the first end of the pad;
a second set of lugs extending away from the second end of the pad;
a first grouser positioned on the first surface of the pad adjacent the first end of the pad, the first grouser extending in a direction substantially perpendicular to the direction of travel of the track; and
a second grouser positioned on the first surface of the pad adjacent the second end of the pad, the second grouser extending in a direction substantially perpendicular to the direction of travel of the track,
wherein the first grouser and the second grouser are positioned between the first and second set of lugs.

1. A fluid spray for an underground roof support, the spray including:a first housing portion including an elongated shaft having a first end, a second end, and a first fluid passage extending between the first end and the second end;
a spray outlet positioned adjacent the second end of the shaft;
a second housing portion formed integrally with the first housing portion and positioned adjacent the first end of the shaft, the second housing portion including at least one port and a second fluid passage providing fluid communication between the at least one port and the first fluid passage, each port configured to be coupled to a fluid conduit, the second housing portion further including a first end, a second end, and a second housing axis extending between the first end and the second end, the second housing axis oriented perpendicular to the shaft, the second housing portion further including a pair of planar lateral surfaces extending between the first end of the second housing portion and the second end of the second housing portion; and
a service port aligned with the first fluid passage, the service port being selectively opened to provide access to the first fluid passage from the first end of the first housing portion.

1. A wheel unit for a vehicle, the wheel unit comprising:a suspension housing including a pin defining a steering axis;
a transmission housing coupled to the suspension housing by the pin and pivotable about the steering axis;
a wheel rim rotatable about a rotational axis and configured to pivot about the steering axis with the transmission housing; and
a compound planetary transmission drivingly engaged with the wheel rim, the compound planetary transmission including,
an input drive shaft coupled to the suspension housing,
a sun gear rotatable about the rotational axis,
a constant velocity joint coupled between the input drive shaft and the sun gear,
a first ring gear fixed relative to the transmission housing,
a first planet gear enmeshed with the sun gear and the first ring gear,
a second ring gear fixed relative to the wheel rim for co-rotation about the rotational axis,
a second planet gear enmeshed with the second ring gear, and
a shaft coupled to the first planet gear and the second planet gear;
wherein rotation of the input drive shaft results in rotation of the second ring gear; and
wherein the first planet gear includes a first diameter and the second planet gear includes a second diameter, and wherein the first diameter is smaller than the second diameter.

12. A method of detecting wear of a cutter bit driven by an actuator of an industrial machine having a cutter drum, the method comprising:monitoring, via a sensor, an angle of the cutter drum with respect to the chassis;
determining, via a controller, a cutting load of the industrial machine based on the angle of the cutter drum;
determining, via the controller, the cutter bit is worn based on the cutting load of the industrial machine; and
outputting, from the controller, a signal when the cutter bit is determined to be worn.

1. A method for monitoring a mining machine including an electronic controller, the method comprising:operating the mining machine to cut into a mine face using a shearing motion at a plurality of cut locations;
for each of the plurality of cut locations;
generating, using a boom height sensor mounted on a boom of the mining machine, boom height data;
generating, using a power sensor, power consumption data;
determining, with the electronic controller, a cut start time based on a conveyor motor start time;
determining a conveyor motor stop time;
determining whether a relocation has occurred; and
when the relocation has occurred;
determining a cut end time based on conveyor motor stop time and the relocation;
storing, in a memory coupled to the electronic processor, the cut start time, the cut end time, the boom height data, and the power consumption data; and
adjusting the operation of the mining machine based on the cut start time, the cut end time, the boom height data, and the power consumption data for at least one of the plurality of cut locations.

1. A method of monitoring a roof support of a longwall mining system, the method comprising:obtaining, with an electronic processor, pressure information for the roof support;
determining, with the electronic processor, whether the pressure information is indicative of a first type of pressure failure of the roof support by determining whether the roof support achieved set pressure within a first predetermined amount of time;
determining, with the electronic processor, whether the pressure information is indicative of a second type of pressure failure of the roof support, the second type of pressure failure being different than the first type of pressure failure; and
generating, with the electronic processor, an alert in response to determining that the pressure information is indicative of at least one selected from the group consisting of the first type of pressure failure and the second type of pressure failure.

9. A rotary sensor assembly comprising:a sensor including a sensor housing and a rotor, the sensor housing having an interior chamber, the rotor positioned within the interior chamber and rotatable relative to the sensor housing about a rotor axis, the sensor detecting the angular position of the rotor relative to the sensor housing about the rotor axis;
a shaft including a first end and a second end, the first end coupled to the rotor, the shaft supported for rotation relative to the sensor housing about the rotor axis;
a support housing portion including a bore extending along a support axis; and
a member at least partially positioned in the bore, the member coupled to the second end of the shaft, the member movable relative to the support housing portion in a direction parallel to the support axis in response to deflection of the second end of the shaft relative to the rotor axis.

1. A braking device for a conveyor system, the conveyor system including a continuous belt driven in a direction of travel, the braking device comprising:a carriage supported for movement in a direction parallel to the direction of travel of the belt, the carriage including a plurality of rolls and at least one return pulley, the plurality of rolls configured to support a portion of the belt;
a brake pulley configured to support a portion of the belt extending from the return pulley; and
a brake selectively retarding rotation of the brake pulley.

1. A drive system for a chain conveyor, the drive system comprising:an elongated shaft extending along an axis and configured to be driven to rotate by a motor;
a sprocket integrally formed with the shaft, the sprocket including a plurality of lobes, the lobes extending around a perimeter of the shaft and each lobe being spaced apart from an adjacent lobe by a recessed portion, each of the recessed portions configured to receive a drive pin of the chain conveyor, each of the lobes subtending an angle of at least twenty degrees about the axis, each lobe including a first portion positioned proximate the axis and a second portion positioned radially outward relative to the first portion, the second portion having a width substantially larger than a width of the first portion.

1. A support for a conveyor, the support comprising:a frame including a support arm, the support arm including a first side, a second side, an end surface, and a slot extending between the first side and the second side and forming an opening in the end surface;
a roller including a shaft and a shell supported for rotation relative to the shaft, a portion of the shaft positioned in the slot; and
a retainer for releasably securing the shaft relative to the support arm, the retainer including a first portion engaging the first side and a second portion engaging the second side, the second portion biased toward the first portion to exert a compressive force on the support arm, at least one of the first portion and the second portion extending at least partially around the shaft of the roller.

1. A method for removing slack in a chain conveyor driven between a first sprocket and a second sprocket, the first sprocket and the second sprocket rotating in a first direction, the method comprising:locking the second sprocket to prevent rotation of the second sprocket in a second direction opposite the first direction;
operating the first sprocket in the second direction to position a slack portion between the first sprocket and the second sprocket; and
removing at least one chain link from the slack portion.

1. A seat module for a mining shuttle car that includes a loading end, a discharge end, and a conveyor extending between the loading end and the discharge end, the seat module comprising:an enclosure;
a rotatable platform positioned within the enclosure; and
a seat supported by the rotatable platform and rotatable therewith between a first secured position facing generally toward the loading end, a second secured position facing generally toward the discharge end, and at least one secured position between the first and second positions, wherein the seat is freely rotatable during operation of the mining shuttle car, and wherein operation of the mining shuttle car is independent of the position of the seat.

1. A cutting system for a mining machine, the cutting system comprising:a block including a first surface and a second surface opposite the first surface, the block including a block bore and a fluid passage, the block bore extending along an axis through the first surface and at least partially through the block toward the second surface, the fluid passage including a first portion and a second portion in fluid communication with the first portion, the first portion oriented obliquely with respect to the axis of the block bore, the second portion extending at least partially along a perimeter of the block bore;
a sleeve including a sleeve shank, a flange, and a sleeve bore extending through the sleeve shank and the flange, the sleeve shank positioned within the block bore, a surface of the flange engaging the first surface of the block; and
a seal positioned in the block bore between the second portion of the fluid passage and the sleeve shank to prevent contact between a fluid in the fluid passage and an outer surface of the sleeve shank, the seal capable of being inserted into the block bore from the first surface,
wherein the second portion of the fluid passage includes a pair of edge surfaces, a width of the second portion extending between the edge surfaces,
wherein the seal has a seal width greater than the width of the second portion, the seal engaging both edge surfaces.

1. A link assembly for moving material in a direction of movement from a first end of a conveyor toward a second end of the conveyor, the link assembly comprising:a first link including a first side edge positioned between a first end and a second end of the first link, the first link including a first indicator; and
a second link including a second side edge extending between a first end and a second end of the second link, the second link including a second indicator, the second link coupled to the first link such that the first side edge of the first link overlaps with the second side edge of the second link in a direction transverse to the direction of movement, elongation of the first link in the direction of movement causes the first indicator to move relative to the second indicator, and a position of the first indicator relative to the second indicator providing an indication of a wear condition of the first link.

18. A longwall mining system comprising:a plurality of controllable components including a conveyor, a shearer, and a plurality of power roof supports;
a conveyor characteristic having a desired change in conveyor characteristic;
a controller electrically coupled to the controllable components, the controller configured to execute a plurality of commands to adjust the operation of at least one of the controllable components to achieve the desired change in conveyor characteristic; and
a command hierarchy of commands, the controller configured to execute the plurality of commands according to the command hierarchy.

1. A conveyor system configured to move material relative to a mine face, the conveyor system comprising:a conveyor pan configured to support the material;
a drive unit including a drive shaft and a plurality of sprockets secured to the drive shaft, the drive shaft driven about a rotational axis; and
a conveying element including a plurality of chains and a plurality of flights, each of the chains driven by one of the sprockets to move the chain and the flights over the conveyor pan, each of the flights coupled between the plurality of chains, each of the plurality of flights including a first portion and a second portion, the first portion coupled to the second portion by a movable joint, the flights configured to move the material over the conveyor pan;
wherein the plurality of sprockets are angularly offset about the rotational axis relative to each other, and wherein the first portion moves relative to the second portion at the movable joint in response to the plurality of chains engaging the plurality of sprockets and moving about the rotational axis.

1. A conveyor chain for a mining machine, the conveyor chain comprising:a first link cast as a unitary piece including,
a first side portion having a first aperture, a second aperture, and a first drive pin disposed between the first aperture and the second aperture, the first drive pin configured to be driven by a first sprocket, and
a second side portion having a first aperture, a second aperture, and a second drive pin disposed between the first aperture and the second aperture and extending in a direction opposite the first drive pin, the second drive pin configured to be driven by a second sprocket;
a second link cast as a unitary piece including,
a first side portion having a first aperture, a second aperture, and a first drive pin disposed between the first aperture and the second aperture, the first drive pin configured to be driven by the first sprocket, and
a second side portion having a first aperture, a second aperture, and a second drive pin disposed between the first aperture and the second aperture and extending in a direction opposite the first drive pin, the second drive pin configured to be driven by the second sprocket; and
a connecting link coupled between the first link and the second link.

12. A controller for detecting face alignment of a longwall mining system, the controller comprising an electronic processor and executable instructions stored in a memory configured to:determine a shearer path of a shearer along an ore face, the shearer path being determined based on a signal, from a first indicator device on the shearer, that is received by a detection device coupled to the controller and located in a maingate roadway; and
generate an indication of face alignment based on the shearer path by:
determining a line of best fit for the shearer path, and
determining an angle of intersection between the line of best fit and a maingate line extending along the maingate roadway.

1. A method of tensioning a conveyor element of a conveyor, the method comprising:generating, with a proximity sensor, an output signal indicative of the conveyor element being under-tensioned;
receiving, with an electronic processor, the output signal from the proximity sensor;
activating, with the electronic processor, a hydraulic apparatus including a cylinder having an extendible piston;
pushing, with the cylinder, a take-up bar coupled to the cylinder and to a shaft of the conveyor;
imparting, via a locking plate, a locking force on the take-up bar;
overcoming the locking force from the locking plate; and
moving the shaft of the conveyor away from a centerline of the conveyor with the take-up bar when the cylinder is driven and the locking force is overcome.

1. A conveyor assembly comprising:a frame having a wall;
a first sliding plate slidably coupled to the wall;
a second sliding plate slidably coupled to the wall;
a conveyor supported by the frame;
a first non-driven idler shaft coupled to the conveyor;
a drive shaft coupled to the conveyor and to the first sliding plate; and
a drive motor coupled to the drive shaft and to the second sliding plate.

9. A mining machine comprising:a chassis including a first end, a second end, and a chassis axis extending between the first end and the second end, the chassis movable in a direction parallel to the chassis axis;
a cutting assembly coupled to the chassis, the cutting assembly including an arm and a cutting drum supported by the arm for rotation relative to the arm, the cutting drum including a plurality of cutting elements; and
a spray arm coupled to the chassis and positioned proximate the cutting assembly, the spray arm including a first portion, a second portion pivotably coupled to the first portion, and at least one spray nozzle for emitting a fluid spray in a region adjacent the cutting assembly, the first portion pivotally coupled to the chassis and extending away from the chassis along a spray arm axis, the second portion pivotable relative to the first portion about a wrist axis, the spray arm further including a joint coupling the first portion and the second portion, a first biasing member, and a second biasing member, the first biasing member coupled between the joint and the first portion, the second biasing member coupled between the joint and the second portion, the first biasing member and the second biasing member biasing the second portion toward a neutral position.

1. A computer implemented method for controlling operation of a mining system, the mining system including a shearer and a conveyor, the method comprising:determining, using a processor, a position of the shearer based on a first signal from a first sensor, the first signal associated with the position of the shearer;
determining, using the processor, a load of the conveyor based on a second signal from a second sensor, the second signal associated with the load of the conveyor;
determining, using the processor, an output of the mining system based on the determined position of the shearer and the determined load of the conveyor;
generating, using the processor, a first control signal for a first drive mechanism to control a speed of the shearer based on the determined output of the mining system; and
generating, using the processor, a second control signal for a second drive mechanism to control a speed of the conveyor based on the determined output of the mining system.

1. A tool for moving a bit sleeve relative to a bore of a bit block, the bit sleeve including a shank and a bore for receiving a bit, the tool comprising:an actuator assembly including a cylinder and a ram, the cylinder including a first end and a second end, the ram movable relative to the cylinder;
a rod including a first end and a second end, the rod defining a rod axis extending between the first end and the second end, the rod coupled to the ram;
a first nut selectively coupled to one of the first end of the rod and the second end of the rod, the first nut defining a first dimension; and
a second nut selectively coupled to the other of the first end of the rod and the second end of the rod, the second nut defining a second dimension.

1. A fluid spray for an underground roof support, the spray including:an elongated shaft having a first end, a second end, and a first fluid passage extending between the first end and the second end, a shaft axis extending between the first end and the second end;
a spray outlet positioned adjacent the second end of the shaft; and
a housing portion formed integrally with the shaft and positioned adjacent the first end of the shaft, the housing portion including a first end and a second end, the first end and the second end of the housing portion positioned radially outward of an outer surface of the shaft with respect to the shaft axis, a housing axis extending between the first end and the second end of the housing portion and oriented perpendicular to the shaft axis, the housing portion further including a port positioned on the first end of the housing portion and a second fluid passage providing fluid communication between the port and the first fluid passage.

1. A machine for excavating rock, the machine comprising:a frame;
a cutting device including a shaft and a cutting disc having a cutting edge, the cutting disc supported for free rotation relative to the shaft about a cutting device axis; and
a boom supporting the cutting device, the boom including a first end, a second end, and a boom axis substantially parallel to the cutting device axis, the boom further including a first portion and a second portion, the first portion coupled to the frame for rotation about a first pivot axis between a raised position and a lowered position, the second portion coupled to the cutting device, the second portion pivotable about a second pivot axis between a raised position and a lowered position,
wherein the shaft is supported for free rotation relative to the boom, and
wherein the cutting device further includes an exciter shaft and an eccentric mass positioned adjacent an end of the shaft and rotating about an exciter axis, rotation of the exciter shaft and eccentric mass inducing an oscillation of the shaft and the cutting element.

1. A conveyor system comprising:a first sprocket operable to rotate in a first direction and a second direction;
a second sprocket operable to rotate in the first direction and the second direction;
a chain extending between the first sprocket and the second sprocket, the chain nominally driven by at least one of the first sprocket and the second sprocket in the first direction, the chain including a plurality of flights for conveying material;
a pawl selectively engageable with the second sprocket to inhibit the second sprocket from rotating in the second direction; and
a tensioner unit selectively engageable with the first sprocket, the tensioner unit operable to rotate the first sprocket in the second direction when the pawl is engaged with the second sprocket.

1. A mining machine comprising:a frame for supporting the machine on a support surface;
a boom including a first end coupled to the frame and a second end positioned away from the frame;
a cutter head coupled to the second end of the boom, the cutter head including
a first member defining a first end and a second end, the first member including a first mass,
a cutting bit coupled to the first member proximate the second end, the cutting bit including a cutting edge, the first member and the cutting bit at least partially defining a first mass center, and
a second member rotatable about an axis and including a second mass eccentrically positioned with respect to the axis, the first mass and the second mass at least partially defining a combined center of mass, rotation of the second mass about the axis causing the first member and the cutting bit to oscillate about the combined center of mass; and
a coupling mechanism including a first end positioned adjacent the second end of the boom and a second end coupled to the cutter head, the coupling mechanism supporting the cutter head,
wherein the cutting bit is rotatable relative to the first member.

1. A feeder breaker comprising:a frame;
a first crusher coupled to the frame and configured to receive a material;
a second crusher coupled to the frame;
a conveyor extending between the first crusher and the second crusher, the conveyor configured to convey the material exiting the first crusher to the second crusher; and
an output conveyor configured to receive the material exiting the second crusher;
wherein at least a portion of the material exiting the first crusher that is below a predetermined size threshold moves to the output conveyor without passing through the second crusher, and
wherein the output conveyor is positioned underneath the second crusher.

1. A conveyor pan for supporting a portion of a mining conveyor extending along a mine face, the mining conveyor positioned between the mine face and a goaf, the conveyor pan comprising:a deck including a first side configured to be positioned proximate the mine face and a second side configured to be positioned proximate the goaf;
a toe positioned adjacent the first side of the deck, the toe including a toe contact surface defining a toe surface area;
a heel positioned adjacent the second side of the deck, the heel including a lug and a heel contact surface, the lug configured to be coupled to an advancement mechanism, the heel contact surface defining a heel surface area greater than the toe surface area.

1. A mining machine comprising:a frame;
a first boom supported for pivoting movement relative to the frame;
a second boom supported for pivoting movement relative to the frame, the second boom being movable independent of the first boom;
a first cutter head pivotably coupled to the first boom, the first cutter head movable through a first range of movement, the first cutter head including a first cutter shaft, a first cutting disc, and a first excitation mechanism, the first cutting disc supported for free rotation relative to the first cutter shaft about a first cutter axis, the first cutting disc including a plurality of first cutting bits defining a first cutting edge, the first excitation mechanism including a first exciter shaft and a first mass eccentrically coupled to the first cutter shaft, rotation of the first exciter shaft inducing oscillating movement of the first cutter shaft and the first cutting disc; and
a second cutter head pivotably coupled to the second boom, the second cutter head laterally offset from the first cutter head in a direction transverse to a longitudinal axis of the frame, the second cutter head movable through a second range of movement intersecting the first range of movement at an overlap region, the second cutter head being laterally movable into a position that overlaps a position of the first cutter head in a height direction of the frame, the second cutter head including a second cutter shaft, a second cutting disc, and a second excitation mechanism, the second cutting disc supported for free rotation relative to the second cutter shaft about a second cutter axis, the second cutting disc including a plurality of second cutting bits defining a second cutting edge, the second excitation mechanism including a second exciter shaft and a second mass eccentrically coupled to the second cutter shaft, rotation of the second exciter shaft inducing oscillating movement of the second cutter shaft and the second cutting disc.

1. A longwall mining system comprising:a plurality of powered roof supports, each powered roof support including a controllable hydraulic piston configured to apply an adjustable support pressure on a mine roof;
a shearer configured to move across a mine face as the plurality of powered roof supports are arranged in a series along the mine face; and
an electronic control unit configured to
receive data from each powered roof support of the plurality of powered roof supports indicative of fluid pressure within each respective controllable hydraulic piston, and
monitor a condition of the mine roof based on changes in the received data over a period of time,
wherein the electronic control unit is configured to monitor the condition of the mine roof based on changes in the received data over a period of time by generating a graphical pressure map, the graphical pressure map including
a plurality of parallel display lines each providing an indication of fluid pressure within a different one of the controllable hydraulic pistons of the plurality of powered roof supports over the period of time, and
a shearer position line indicative of a position of the shearer relative to the plurality of powered roof supports over the period of time overlaid onto the plurality of parallel display lines.

1. A conveyor chain comprising:a first link including a first sprocket-engaging portion and a second sprocket-engaging portion, the first sprocket-engaging portion and the second sprocket-engaging portion each protruding laterally away from one another;
a second link including a first sprocket-engaging portion and a second sprocket-engaging portion, the first sprocket-engaging portion and the second sprocket-engaging portion of the second link each protruding laterally away from one another; and
a coupler link coupling the first link to the second link, the coupler link including a first end and a second end, the first end positioned laterally between the first sprocket-engaging portion and the second sprocket-engaging portion of each link, the coupler link further including a lateral opening and a concave pocket, the lateral opening extending through the first end, the concave pocket formed on an inner surface and extending around a portion of the lateral opening, the concave pocket having an at least partially spherical shape, the coupler link further including a bearing positioned in the pocket and having an outer spherical surface, the bearing supporting a connecting pin extending through the lateral opening and engaging the first link, the bearing permitting pivoting movement of the first link about a plurality of axes.

1. A monitoring device for a longwall mining system including a shearer having a first cutter drum, a second cutter drum, and a first sensor to determine a position of at least one of the shearer, the first cutter drum, and the second cutter drum over a shear cycle, the monitoring device comprising:a memory; and
an electronic processor coupled to the memory and in communication with the shearer to receive shearer position data including information regarding at least one of a group consisting of the position of the shearer, the position of the first cutter drum, and the position of the second cutter drum, the electronic processor configured to
identify, from the shearer position data, profile data obtained over a shear cycle including a plurality of pan lengths;
for each pan length of the plurality of pan lengths in the shear cycle, analyze the profile data to determine whether a parameter is outside of a normal operating range for the each pan length; and
generate an alert in response to determining, via the analyzing of the profile data, that the parameter is outside of the normal operating range for one of the plurality of pan lengths.

1. A conveyor system comprising:a plurality of crawler members configured to move along a ground surface;
a frame supported by the crawler members and extending along a longitudinal axis;
a skid pad moveable relative to the frame to raise and lower the frame relative to a ground surface;
an intake structure supported by the frame, the intake structure including a first conveyor; and
a discharge boom supported by the frame, the discharge boom including a second conveyor, wherein the boom is configured to pivot 90 degrees from a horizontal position along the longitudinal axis to a vertical position relative to the longitudinal axis so as to extend vertically relative to the ground surface.

1. A conveyor chain comprising:a first link including a first portion and a second portion, the first portion including a first surface, the second portion including a second surface oriented parallel to and spaced apart from the first surface, the first portion including a first sprocket-engaging portion protruding from a first side opposite the first surface and extending laterally away from the second portion, the second portion including a second sprocket-engaging portion protruding from a second side opposite the second surface and extending laterally away from the first portion;
a second link including a first portion and a second portion, the first portion including a first surface, the second portion including a second surface oriented parallel to and spaced apart from the first surface of the second link, the first portion including a first sprocket-engaging portion protruding from a first side opposite the first surface and extending laterally away from the second portion of the second link, the second portion including a second sprocket-engaging portion protruding from a second side opposite the second surface and extending laterally away from the first portion of the second link;
a coupler link including a first end and a second end;
a first connecting pin extending through the first end of the coupler link, the first connecting pin extending between the first surface of the first link and the second surface of the first link to removably couple the first end to the first link, the first connecting pin oriented parallel to and offset from the first sprocket-engaging portion and the second sprocket engaging portion of the first link, the first connecting pin extending partially through the first portion and partially through the second portion of the first link; and
a second connecting pin extending through the second end of the coupler link, the second connecting pin extending between the first surface of the second link and the second surface of the second link to removably couple the second end to the second link, the second connecting pin oriented parallel to and offset from the first sprocket-engaging portion and the second sprocket engaging portion of the second link, the second connecting pin extending partially through the first portion and partially through the second portion of the second link.

1. A monitoring device for a longwall mining system including a shearer having a first cutter drum and a second cutter drum, the monitoring device comprising:a memory; and
an electronic processor coupled to the memory and in communication with the shearer, the electronic processor configured to
receive shearer position data from a shearer sensor configured to determine a position of at least one selected from the group of the shearer, the first cutter drum, and the second cutter drum;
identify from the shearer position data, a first transition point indicative of a start point of a discrete shear cycle;
identify, from the shearer position data, a second transition point indicative of an end point of the discrete shear cycle;
generate profile data for the discrete shear cycle based on the shearer position data, the first transition point, and the second transition point; and
generate an alert, for display on a display screen, based on analysis of the profile data.

1. A cutting device for engaging a rock face, the cutting device comprising:a disc body supported for rotation about an axis of rotation, the disc body including a plurality of peripheral surfaces, each of the peripheral surfaces oriented in a plane at an oblique angle relative to the axis of rotation; and
a plurality of peripheral portions removably secured to the disc body, each of the peripheral portions engaging an associated one of the peripheral surfaces, each of the peripheral portions including a plurality of cutting bits positioned on a peripheral edge, the peripheral edge of each peripheral portion aligned with the peripheral edges of adjacent peripheral portions.

1. A tensioning system for a conveyor element of a conveyor, the tensioning system comprising:an obstruction;
a base movable relative to the obstruction between a first configuration and a second configuration, the base positioned farther from the obstruction in the second configuration;
a shim receiving area defined between the obstruction and the base;
a rail spaced apart from the obstruction; and
a plurality of shims disposed on the rail, each shim of the plurality of shims movable relative to the rail and movable into the shim receiving area,
wherein:
in the first configuration, the obstruction prevents a respective shim from entering the shim receiving area, and
in the second configuration, the obstruction no longer prevents the respective shim from entering the shim receiving area.

11. A shuttle car comprising:a chassis;
a bed for supporting material, the bed including a conveyor device for moving the material relative to the bed;
traction members for supporting the chassis for movement; and
a plurality of jacks secured to the chassis, each jack including,
a tube coupled to the chassis,
a cylinder assembly supported by the tube, the cylinder assembly including a barrel and a rod at least partially received within the barrel, actuation of the cylinder assembly causing the barrel to move relative to the tube in a first direction parallel to a longitudinal axis of the tube while the rod remains stationary relative to the tube, and
a locking device selectively positionable in a locked position in which the locking device engages the tube and at least partially inhibits the barrel from moving in a second direction opposite the first direction, the locking device including a first leg and a second leg, when the locking device is in the second position, the first and second legs extend through the tube and are positioned on circumferentially opposite sides of the rod.

1. A cutting device for engaging a rock face, the cutting device comprising:a disc body supported for rotation about an axis of rotation, the disc body including a plurality of peripheral surfaces, each of the peripheral surfaces oriented in a plane at an oblique angle relative to the axis of rotation; and
a plurality of peripheral portions removably secured to the disc body, each of the peripheral portions engaging an associated one of the peripheral surfaces, each of the peripheral portions including a plurality of cutting bits positioned on a peripheral edge, the peripheral edge of each peripheral portion aligned with the peripheral edges of adjacent peripheral portions.

1. A mining machine including:a frame;
a cutting head supported for movement on the frame;
an actuator for stabilizing the frame relative to a mine surface, the actuator coupled to the frame and including an end extendable in a first direction to engage the mine surface; and
a control system configured to operate the actuator, the control system configured to retract the actuator, for a predetermined amount of time, from a position at which at least one indicator of the force between the actuator and the mine surface satisfies a specified range, and extend the actuator for the predetermined amount of time plus an additional amount of time.

1. A track for a crawler traction system, the track being driven in a direction of travel by a sprocket to move over a support surface, the sprocket having a plurality of teeth, the track comprising:a first link including,
a first end,
a second end spaced apart from the first end along the direction of travel,
a first surface positioned between the first end and the second end, the first surface engaging the support surface,
a second surface positioned between the first end and the second end, the second surface facing in a direction substantially opposite the first surface,
at least one first opening extending through the first link between the first surface and the second surface, the first opening being operable to receive a sprocket tooth,
a plurality of first lugs protruding from the first end,
a plurality of second lugs protruding from the second end,
at least one transverse grouser positioned on the first surface adjacent one of the first end and the second end, each transverse grouser positioned on the first surface being oriented in a direction substantially perpendicular to the direction of travel of the track; and
a second link including,
a first end,
a second end spaced apart from the first end of the second link along the direction of travel,
a first surface positioned between the first end of the second link and the second end of the second link, the first surface engaging the support surface,
a second surface positioned between the first end of the second link and the second end of the second link, the second surface facing in a direction substantially opposite the first surface of the second link,
at least one second opening extending through the second link between the first surface of the second link and the second surface of the second link, the second opening being operable to receive a sprocket tooth,
a plurality of first lugs protruding from the first end of the second link,
a plurality of second lugs protruding from the second end of the second link,
a pair of angled grousers positioned on the first surface of the second link between the first end and the second end, each of the angled grousers oriented at an acute angle relative to the direction of travel, each of the angled grousers including a first end positioned proximate the first end of the second link and a second end positioned proximate the second end of the second link, the first ends of the angled grousers positioned closer to one another than the second ends of the angled grousers.

1. A cutting device for engaging a rock face, the cutting device comprising:a disc supported for rotation about an axis of rotation, the disc including a peripheral edge extending around the axis of rotation; and
a plurality of cutting elements secured to the disc, the plurality of cutting elements spaced apart along the peripheral edge of the disc and positioned in a cutting plane spaced from the disc, each of the cutting elements including a base portion, a cutting portion including a cutting edge, and a longitudinal axis extending through the cutting edge, the cutting portion having a width that is larger than a width of the base portion, the cutting edge aligned in the cutting plane that is generally orthogonal relative to the axis of rotation.

1. A boom for supporting a drilling and bolting tool, the boom comprising:a first portion including a first end and a second end, a longitudinal axis extending between the first end and the second end;
a second portion including a proximal end and a distal end, the proximal end supported for translational movement relative to the first portion in a direction parallel to the longitudinal axis, the distal end configured to support the drilling and bolting tool;
an actuator for moving the second portion relative to the first portion parallel to the longitudinal axis;
a fluid passage for conveying pressurized fluid between the first end of the first portion and the drilling and bolting tool adjacent the distal end of the second portion, the fluid passage positioned within the first portion and the second portion; and
a rotary actuator and flow distributor secured to the distal end of the second portion, the rotary actuator and flow distributor configured to support the drilling and bolting tool for rotational movement about the distal end and providing fluid communication between the fluid passage and the tool.

1. A cutting bit assembly for a mining machine, the cutting bit assembly comprising:a holder including a first surface, a second surface, and a bore extending therebetween;
a bit including a first end and a second end, the bit further including a tip proximate the first end, a shank proximate the second end, and a shoulder positioned between the tip and the shank, the shank positioned in the bore of the holder, the shank defining a shank axis, the shoulder positioned proximate the first surface of the holder, the shank including a projection adjacent the second end, the projection extending substantially perpendicular to the shank axis; and
a retainer coupled to the shank by passing the retainer over the projection along the shank axis, the retainer including an aperture sized to receive the projection, the retainer having an annular shape and including a groove, an outer edge, an inner opening, and an angled surface, the angled surface positioned within the inner opening, the angled surface extending along an angular portion around the inner opening, the angled surface extending between the groove and the aperture, as the retainer is rotated relative to the bit the projection moves along the angled surface and slides into the groove, the retainer further including a resilient member positioned proximate the second surface of the holder and biasing the retainer along the shank axis and away from the holder, the resilient member biasing the projection to remain within the groove.

1. A cutting assembly for a rock excavation machine including a frame, the cutting assembly comprising:a boom including a first portion and a movable portion, the first portion supported for pivotable movement relative to the frame, the first portion extending along a longitudinal base axis, the movable portion coupled to the first portion and moveable relative to the first portion in a direction parallel to the longitudinal base axis;
at least one bearing supporting the movable portion for movement relative to the first portion, each bearing including a main support and a pad, the main support secured to the first portion, the pad abutting a surface of the movable portion, each bearing including a biasing member for biasing the pad against the surface of the movable portion; and
a cutting device supported proximate an end of the movable portion of the boom,
wherein the each bearing includes a member having a spherical surface to permit pivoting movement of the pad relative to the main support.

11. A mining machine comprising:a boom including a cutting drum;
a boom height sensor mounted on the boom;
a memory;
an electronic controller coupled to the boom height sensor and the memory, and configured to;
operate the mining machine to cut into a mine face with the cutting drum in a shearing motion at a plurality of cut locations;
for each of the plurality of cut locations;
generate, using the boom height sensor, boom height data;
receive power consumption data;
determine a cut start time;
determine whether a relocation has occurred; and
when the relocation has occurred;
determine a cut end time;
store, in a memory coupled to the electronic processor, the cut start time, the cut end time, the boom height data, and the power consumption data; and
adjust the operation of the mining machine based on the cut start time, the cut end time, the boom height data, and the power consumption data for at least one of the plurality of cut locations.

1. A guide shoe for a mining machine, the guide shoe comprising:an elongated shoe body including a first end, a second end, and a slot extending between the first end and the second end along a slot axis, the shoe body further including a first wall extending along a first side of the slot and a second wall extending along a second side of the slot;
an insert coupled to the shoe body to inhibit rotation of the insert relative to the shoe body during operation of the mining machine, the insert extending along at least a portion of a perimeter of a cross-section of the slot, the insert positioned between the first wall and the slot axis and between the second wall and the slot axis, the insert including an end positioned adjacent the first end of the shoe body; and
a fastener for securing the insert against movement relative to the shoe body in a direction parallel to the slot axis, the fastener including a longitudinal axis oriented in a direction parallel to the slot axis.

1. A tensioning system for a conveyor element of a conveyor, the tensioning system comprising:a hydraulic apparatus including a cylinder having an extendible piston;
a locking plate including a biasing spring and a locking member having a plurality of ratchet grooves, the biasing spring biasing the locking member and the plurality of ratchet grooves towards the take-up bar; and
a take-up bar coupled to the cylinder and coupled to a shaft of the conveyor, the take-up bar including a plurality of teeth extending along a length of the take-up bar and configured to engage with the ratchet grooves of the locking member, wherein the take-up bar moves the shaft of the conveyor in a forward direction away from the centerline of the conveyor when overcoming a locking force from the locking plate, the locking force resulting from the biasing spring causing the plurality of ratchet grooves to engage the plurality of teeth.

1. An electrical filtering system for use with an industrial machine, the system comprising:a power center including a transformer and a ground fault relay;
a first motor electrically connected to the power center;
a first variable speed drive connected to the first motor, the first variable speed drive configured to vary the speed of the first motor; and
a first common mode choke connected in a series-type connection between the power center and the first variable speed drive, the first common mode choke configured to suppress a ground current induced by the first variable speed drive, wherein the common mode choke includes a plurality of windings, each winding having a first end coupled a power supply line of the power center and a second end coupled to the variable speed drive.

1. A longwall mining system comprising:an armored face conveyer;
a shearer configured to travel along the armored face conveyor in a first direction or a second direction, the shearer including a shearer housing, a first cutter drum extended in the first direction away from the shearer housing, and a second cutter drum extended in the second direction away from the shearer housing;
a first camera configured to generate a first signal associated with the first direction of travel for the shearer;
a second camera configured to generate a second signal associated with the second direction of travel for the shearer; and
a controller including a non-transitory computer readable medium and a processor, the controller comprising computer executable instructions stored in the computer readable medium for controlling operation of the longwall mining system to:
receive the first signal from the first camera,
receive the second signal from the second camera,
analyze at least one of the first signal and the second signal to identify one or more edges of a structure of the longwall mining system ahead of the shearer in either the first direction or the second direction,
generate a forward-looking mine profile based on the one or more edges, and
control the longwall mining system based on the forward-looking mine profile.

1. An industrial machine comprising:an actuator;
a gear reducer configured to receive a first rotational energy from the actuator and output a second rotational energy;
a cutter drum supported by a chassis of the industrial machine, the cutter drum driven by the second rotational energy;
a cutter bit coupled to the cutter drum;
a sensor configured to sense a characteristic of the industrial machine, wherein the characteristic is stress wave energy; and
a controller, having a processor and memory, the controller configured to
receive the characteristic of the industrial machine,
determine a cutting efficiency based on the characteristic of the industrial machine, and
output the cutting efficiency.

1. A cutting assembly for a rock excavation machine, the rock excavation machine including a frame, the cutting assembly comprising:a boom supported on the frame, the boom including a first portion and a second portion, the first portion including a first structure and a second structure slidable relative to the first structure, the second portion including a first member pivotably coupled to the second structure, and a second member pivotably coupled to the first member, the boom further including a first fluid actuator for pivoting the first member relative to the first portion, a second fluid actuator for driving sliding movement of the second structure relative to the first structure, and at least one biasing member coupled between the first member and the second member; and
a cutting device supported on the second member,
wherein the second member is pivotably coupled to the first member by a universal joint, the second portion further including a plurality of biasing members coupled between the first member and the second member.

1. A method of controlling a pitch angle of a shearer, the method comprising:storing in a memory, as historical corrective actions, for one or more previous shearer passes, a previous pitch correction height, a previous pitch difference, and a previous achieved change in pitch angle resulting from changing a height of a floor cutter of the shearer based on the previous pitch correction height;
receiving a sensor signal indicative of the pitch angle of the shearer;receiving a target pitch profile defining a plurality of target pitch angles for different sections of a mineral face;determining, with an electronic processor, a pitch difference between the pitch angle and a target pitch angle of the plurality of target pitch angles of the target pitch profile;
determining a pitch compensation value based on the historical corrective actions;
determining, with the electronic processor, a pitch correction height corresponding to a new height for the floor cutter based on the pitch difference and pitch compensation value; and
changing, with the electronic processor, a height of the floor cutter based on the pitch correction height.

1. A connector for coupling a plurality of underground roof supports, each roof support including a canopy, the connector comprising:a guide configured to be coupled to one of the roof supports, the one of the roof supports moveable in a direction of advance;
an actuator including a bore and a rod at least partially positioned in the bore, a first end of the rod being slidably coupled to the guide, a second end of the rod opposite the first end positioned in the bore, an axis of the rod extending through the first end and the second end, the actuator positioned relative to the one of the roof supports such that the axis is oriented transverse to the direction of advance; and
a cable having a first end coupled to the first end of the rod and a second end adapted for connection to another of the roof supports.

1. A mining machine comprising:a frame;
a boom supported for pivoting movement relative to the frame;
a cutter head supported on the boom, the cutter head including,
a housing pivotably coupled to the boom,
a cutter shaft coupled to the housing and secured against rotation about a longitudinal axis of the cutter shaft, the shaft including a first end, a second end, a first portion positioned adjacent the first end and a second portion positioned adjacent the second end, the second portion extending parallel to a cutter axis,
a cutting disc coupled to the second portion of the cutter shaft and supported for free rotation relative to the cutter shaft about the cutter axis, the cutting disc including a plurality of cutting bits defining a cutting edge, and
an excitation mechanism including an exciter shaft and an eccentric mass supported on the exciter shaft for rotation about an exciter axis, the exciter shaft driven for rotation relative to the cutter shaft about an exciter axis, rotation of the exciter shaft inducing oscillating movement of the second portion of the cutter shaft and the cutting disc.