Coal mine mining and filling integrated coal mining method

Abstract

The invention discloses a coal mining and filling integrated method for a coal mine. The method comprises the following steps: (1) digging out an air returning and filling pipeline lane, a boundary air lane and a transportation and air intaking lane of a mining region on a working surface of the mining region; (2) mining coal with a narrow strip channel in the working surface of the mining region, in which a ventilating system is formed, after coal mining in each narrow strip channel is finished, communicating the transportation and air intaking lane of the mining region with the air returning and filling pipeline lane of the mining region through narrow strip channels; (3) transporting coal mine cementing filling material slurry into a narrow strip channel excavating region formed after the coal mining in the narrow strip channels is finished for filling; and (4) mining the coal in the narrow strip channels while filling the narrow strip channel excavating region. The mechanical cementing, filling and milling method for the coal mining, disclosed by the invention, is beneficial to sufficiently developing underground coal resources, protecting the ecological environment and ground vegetation, releasing a large number of dull coal and prolonging the service life of a mine, and has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention relates to a coal mining technology in a coal mine, in particular to an integrated coal mining method for mining, digging and filling in a coal mine. Background technique [0002] In China, most of the extra-thick coal seams are mined by fully mechanized caving. However, under the condition of a strong aquifer overlying the coal body of this mine, the original design is the method of descending layers to control the mining height and full subsidence. Massive waterproof coal rock pillars. At the same time, during the practice of downward mining, it was found that due to the settlement of the roof, the roof was sprayed with too much water, which not only caused a poor working environment, but also caused the risk of water and sand collapse; due to the influence of hydrogeological conditions, a 2-meter thick protection Top coal, resulting in a recovery rate of less than 40% in the mining area, resulting in a serious waste of resources. How...

AI Technical Summary

Problems solved by technology

At the same time, during the practice of downward mining, it was found that due to the settlement of the roof, the roof was sprayed with too much water, which not only caused a poor working environment, but also caused the risk of water and sand collapse; due to the influence of hydrogeological conditions, a 2-meter thick protection top coal, resulting in a recovery rate of less than 40% in the mining area, resulting in a serious waste of resources

However, the traditional full-sink coal mining method causes serious deformation and settlement of the overlying surrounding rock and the ground surface, resulting in stratum damage and large geological disasters. , the increase in scale is exacerbated, which poses a great threat to mine safety

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