Telescopic roadway gangue filling machine for underground coal mine

The invention belongs to the technical field of coal mining, and particularly relates to a telescopic roadway gangue filling machine for an underground coal mine. The anti-deviation problem of connection between a discharging device and a main belt of a belt conveyor during unit work and when a unit retreats is solved. According to the technical scheme, the telescopic roadway gangue filling machine for the underground coal mine comprises traveling parts, a machine body part, a gangue throwing device, the discharging device, rear supporting parts, an electrical system and a hydraulic system; and the traveling parts are arranged on the left side and the right side below the machine body part, the gangue throwing device is arranged in the middle of the machine body part, the discharging device is arranged at the rear end of the machine body part, the rear supporting parts are arranged on the left side and the right side below the discharging device, the electrical system is arranged on the right rear side of the machine body part, and the hydraulic system is arranged on the right front side of the machine body part. According to the telescopic roadway gangue filling machine for the underground coal mine, the problems that in the filling process, the unit motor frequency is too high, and a middle frame of the belt conveyor is frequently disassembled when the unit retreats are effectively solved.