Inorganic light single material construction filling device for underground coal mine filling

The invention relates to an inorganic light single material construction filling device for underground coal mine filling, which comprises a base and a cylinder mounted on the base, and further comprises an auger mounted at the bottom of the base, a feed port of the auger is connected with the cylinder through a third guide pipe, and an outlet control mechanism is arranged at a discharge port. A driving shaft of the auger is connected with a variable-speed driving mechanism, the variable-speed driving mechanism and the outlet control mechanism are connected with a gap detection piece, and the gap detection piece makes contact with the outlet control mechanism and the variable-speed driving mechanism to move when entering an air leakage gap. According to the device, the outlet control mechanism is controlled to switch the size of the auger discharge port, the variable speed driving mechanism is controlled to switch the discharge speed of the auger discharge port, and finally, the size of the auger discharge po