Underground raw gangue filling system and method for fully mechanized caving face caving area

Abstract

The invention discloses an underground raw gangue filling system and method for a fully mechanized caving face caving area. The underground raw gangue filling system comprises an underground intelligent dry separation system, wherein a feeding port of the underground intelligent dry separation system is connected with a discharging port of a raw coal conveyor; a discharging port of the underground intelligent dry separation system is connected with a feeding port of an underground crushing system; a discharging port of the underground crushing system is connected with a feeding port of a slurry matching and stirring system; a discharging port of the slurry matching and stirring system is connected with a feeding port of a pumping filling system; and a discharging port of the pumping filling system is connected with a preset filling hole in the fully mechanized caving face caving area. According to the underground raw gangue filling system and method, gangue is separated through the underground intelligent dry separation system, gangue filling slurry is obtained through crushing and slurry stirring preparation, the fully mechanized caving face caving area is filled, and filling treatment of the fully mechanized caving face caving area is achieved; and the gangue is filled underground on the spot, stacking of the gangue is avoided, the surrounding environment of a mine is effectively protected, and the application range of the grouting filling technology of the long-wall mining caving area is widened.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to an underground raw gangue filling system and a filling method in a caving area of ​​a fully mechanized caving face. Background technique [0002] At present, grouting filling in the caving area of ​​longwall mining is mainly used in Germany and Poland; as early as 1991, German Mining and Metallurgy Technology Co., Ltd. cooperated with Ruhr Coal Company, which adopted the tailpipe matched with the fully mechanized mining face of longwall mining The new filling technology applies the technology of paste filling in the caving area to the Walsum Mine to fill the caving area behind the longwall working face to control the surface subsidence caused by mining and dispose of solid waste. [0003] Among them, the paste filling material used is made of fly ash, flotation gangue and crushed rock powder, etc.; the length of the filling pipe connected to the back of the mining...

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Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides an underground raw gangue filling system and filling method in the caving area of ​​the fully mechanized caving face to solve the problem that the existing paste filling needs to be prepared on the well, and the filling pipeline equipment is complicated. costly technical issues

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