Coal mining and filling integrated method for coal mine

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 particular to an integrated coal mining method for coal mining and filling. Background technique [0002] In China, most of the general ultra-thick coal seams are fully mechanized caving mining. However, under the condition of the strong aquifer overlying the coal body of this mine, the original design is the downward slicing control mining height and total subsidence method. A lot of waterproof coal and rock pillars. At the same time, during the downward mining practice, it was found that the roof has too much water spray due to roof subsidence, not only the working environment is poor, but there is also the danger of water and sand collapse; due to the influence of hydrogeological conditions, a 2m thick protection is left during layer mining. The top coal has resulted in a mining area with a recovery rate of less than 40%, causing a serious waste of resources. However, the traditional full-sag coal m...

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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