Coal mining solid filling method

Abstract

A coal mining solid filling method comprises following steps: using the stacked solids on the ground as the filling materials for the working surface goaf, directly putting the solid filling materials from the ground to a belt conveyor in the underworkings by a perpendicular feeding well, transporting to the end of a coal face through the underground belt conveyor, reloading the solid filling materials to a solid filling mining conveyor hung under a back tail beam of a self-impacting type filling hydraulic support by a self-moving type filling material reloading machine. In the process of mining work, the coal is mined and the filling materials are filled on the bottom; and the solid filling materials are compacted by means of a compactor of the self-impacting type filling hydraulic support. The method solves the problem of coal compaction under the building and low coal recovery.

Description

technical field [0001] The invention relates to a coal mining method of solid matter filling in coal mines, and is especially suitable for the mining method of "three-down" coal pressing using solid matter filling. Background technique [0002] With the development of the economy and the progress of society, a consensus has been formed on the social responsibility of enterprises. In order to protect scarce resources, the state has issued a series of policies to urge enterprises to change the past "predatory" mining methods, forcing enterprises to increase resource recovery rates and associated resource utilization. The "three-down" coal mining has always been an issue worthy of attention. According to incomplete statistics, at present, the "three-down" coal pressing in the production mines of the unified coal mines in my country has reached 13.79 billion tons, of which 9.468 billion tons have been built, accounting for the total 69% of coal pressure. In order to improve the...

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Problems solved by technology

Foreign countries often use water-sand and wind filling mining technologies to control surface subsidence. my country has conducted research on filling mining in many mining areas, including strip mining, roadway filling mining, paste and paste-like filling mining and other subsidence reduction technologies. Although the above technologies can effectively control surface subsidence, their degree of mechanization is relatively low, recovery rate is low, production cost is high, production efficiency is poor, and the scale is small or some are in the research stage

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