Backstopping-separating-backfilling-roadway retaining mining method for mine mining and beneficiation

Abstract

The invention discloses a backstopping-separating-backfilling-roadway retaining mining method for mine mining and beneficiation. According to the invention, gangue separated from coal gangue is used as a backfilling material for backfilling of a working surface, roadways are retained along the edges of goafs, and gangue walls are built as support bodies for the roadways retained along the goafs toreinforce and support the roadways and to ensure the stability of the roadways; and the roadway retained along the goafs are used as transportation roadways for the backfilling materials and coal, socoal mining without coal pillars is realized in a mining area. Since the gangue separated from coal gangue in the mining area is used as the backfilling material, the requirements of environmental protection are met; through organic combination of three major systems for coal gangue separating, backfilling mining and retaining and supporting of the roadways along the goafs, respectively, a complete cycle of the backstopping-separating-backfilling-roadway retaining mining method is formed; process is simple; the matching between retaining of roadways along goafs and backstopping, separating and backfilling is realized; various coal pillar resources are recovered, and the solid gangue waste in the mining area can be reasonably treated, so the recovery rate of coal resources is improved; andthus, the method effectively solves the problem of shortage of coal resources and difficulties in efficient mining of mines, and improves the safe production efficiency of coal mines.

Description

technical field [0001] The invention relates to a mine mining design method, in particular to a mine mining, selection, filling and retaining mining method, which belongs to the technical field of coal mining. Background technique [0002] my country's per capita coal resources are relatively small, and the "three strikes" have a large amount of coal pressure, and the normal production of mines continues to be affected. The conventional caving method of coal mining is likely to cause surface subsidence and groundwater and aquifer damage, resulting in damage to surface buildings; and a large amount of gangue is directly discharged and stored, occupying land and polluting the environment. [0003] In recent years, it has actively explored and implemented coal gangue and other solid material filling technology, integrated and innovated relatively mature filling mining technology and equipment, improved resource recovery rate, and achieved certain social and environmental benefi...

AI Technical Summary

Problems solved by technology

However, in the previous coal mining technology of gangue solid filling, the filling material comes from the ground, the transportation path is long, and the ground land is occupied to pile up gangue, which has a certain damage to the environment.

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