A guide shoe for a mining machine includes an elongated shoe body, a slot, an insert coupled to the shoe body, and a retainer secured to the shoe body. The shoe body includes a first end, a second end, a first wall, and a second wall. The slot extends between the first end and the second end along a slot axis, and the slot extends along the first wall and the second wall. The insert is positioned between the shoe body and the slot axis and extends along at least a portion of a perimeter of a cross-section of the slot. The insert includes an end positioned adjacent the first end of the shoe body. The retainer abuts the end of the insert to secure the insert against movement relative to the shoe body in a direction parallel to the slot axis.

A cable handling system for a longwall mining machine is disclosed. The longwall mining machine includes a shearer configured to move along a pan line to mine material along a mine face. The cable handling system includes a service line configured to carry one or more supply lines to the shearer for facilitating shearer operation. Further, a plurality of interconnected trays accommodates the service line. Moreover, a controller is configured to determine a profile of the pan line; detect one or more parameters associated with the service line in relation to the profile of the pan line; and determine a likelihood of at least a portion of the service line dislodging from the plurality of interconnected trays based on the one or more parameters exceeding a predefined threshold.

Disclosed is a comprehensive vertical-lifting drum shearer without a rocker arm suitable for mining a medium-thick long wall coal seam having a coal seam dip angle of less than 30 degrees and a medium-hard or hard coal quality. The comprehensive vertical-lifting no-rocker drum shearer comprises a central control box (1), left and right cutting lifting reduction boxes (9, 8), left and in right side guiding rail fixing casings (4, 5), left and right traction reduction boxes (18, 15), and left and right walking gearboxes (17, 16); the left and right cutting lifting reduction boxes (9, 8) are provided with slideways which are matched with lifting guiding rails (10) of the left and right side guiding rail fixing casings (4, 5) in a sliding manner; the left and right cutting lifting reduction boxes (9, 8) are driven to perform a lifting motion by lifting oil cylinders (19), and meanwhile, cutting motors of the left and right cutting lifting reduction boxes (9, 8) drive a spiral drum to rotate by means of a cutting gear reduction mechanism; the left and right traction reduction boxes (18, 15) drive the left and right walking gearboxes (17, 16), and then drive the whole machine to perform left and right traction movement. The cutting gear reduction mechanism of said shearer uses two-level gear transmission and two-level planetary gear transmission, without a plurality of idle wheel sets, and the transmission chain is simple; and the cooperation of the lifting guiding rails and the slideways makes the whole machine compact in structure, improving the operation reliability and stability.

A composite climb structure includes a climber, a horizontal planar structure, and a ramp coupled on to a base plate. The horizontal planar structure and the ramp are collinearly situated on opposite sides of the climber. The climber is pressed by a robotic vehicle moving on to it from the horizontal planar structure, the climber being pressed to a final position, wherein the angle of elevation (BOC) of the climber is same as the angle of elevation of the ramp, thereby facilitating traversal of the robotic vehicle from the horizontal planar structure on to the ramp.

A composite climb structure includes a climber, a horizontal planar structure, and a ramp coupled on to a base plate. The horizontal planar structure and the ramp are collinearly situated on opposite sides of the climber. The climber is pressed by a robotic vehicle moving on to it from the horizontal planar structure, the climber being pressed to a final position, wherein the angle of elevation (BOC) of the climber is same as the angle of elevation of the ramp, thereby facilitating traversal of the robotic vehicle from the horizontal planar structure on to the ramp.

A guide shoe for a mining machine includes a shoe body, a through hole, and a support. The shoe body is configured to engage a rack. The through hole extends between a first wall of the shoe body and a second wall of the shoe body, and the through hole extends along a central axis. The support is coupled to the first wall, and the support is configured to engage a shaft coupled to a drive sprocket engaging the rack. At least one of the shaft and the support is movable between a first configuration and a second configuration. The rotation axis is spaced apart from the rack by a first sprocket distance in the first configuration, and the rotation axis is spaced apart from the rack by a second sprocket distance in the second configuration.

A guide shoe for a mining machine includes a shoe body, a through hole, and a support. The shoe body is configured to engage a rack. The through hole extends between a first wall of the shoe body and a second wall of the shoe body, and the through hole extends along a central axis. The support is coupled to the first wall, and the support is configured to engage a shaft coupled to a drive sprocket engaging the rack. At least one of the shaft and the support is movable between a first configuration and a second configuration. The rotation axis is spaced apart from the rack by a first sprocket distance in the first configuration, and the rotation axis is spaced apart from the rack by a second sprocket distance in the second configuration.

An interface between a guide shoe of a mining machine and a rack includes a first surface positioned on the guide shoe. and a second surface positioned on the rack. At least one of the first surface and the second surface including a profile oriented at an oblique angle relative to a plane of the rack.

An interface between a guide shoe of a mining machine and a rack includes a first surface positioned on the guide shoe. and a second surface positioned on the rack. At least one of the first surface and the second surface including a profile oriented at an oblique angle relative to a plane of the rack.

A distributed coal cutting device for a Longwall face of a coal mine includes coal cutting units, where each coal cutting unit includes one coal cutting machine and two hydraulic supports, the two hydraulic supports are arranged side by side, the arrangement direction of the two hydraulic supports is parallel to the coal wall of the Longwall face, and the coal cutting machine is connected with one of the hydraulic supports. According to the device, multiple coal cutting machines are used for simultaneously carrying out coal cutting operation, and single-point coal cutting is changed into multiple-point simultaneous coal cutting, so that the coal cutting production capacity and the production efficiency are greatly improved. The multiple coal cutting machines can derive multiple control modes, so that the production flexibility and adaptability are improved.