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 materialsfrom 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 method for coal mining by solid material filling, and is particularly suitable for a method of solid material filling and mining for "three-under" compressed coal. Background technique [0002] With economic development and social progress, corporate social responsibilities have become a consensus. In order to protect scarce resources, the state has issued a series of policies to urge companies to change the past "predatory" mining methods and force companies to increase resource recovery rates and associated resource utilization. The mining of "three-under" compressed coal has always been an issue worthy of attention. According to incomplete statistics, at present, my country's production mines with integrated coal mines only have "three-under" compressed coal reaching 13.79 billion tons, of which 9.468 billion tons are under construction, accounting for the total. 69% of the coal pressure. In order to improve the efficiency of ...

AI Technical Summary

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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