Full negative pressure short wall filling coal mining method

Abstract

The invention provides a full negative pressure short wall filling coal mining method. The full negative pressure short wall filling coal mining method comprises the following steps that 10, positionsof a centralized return air lane and a centralized transportation lane are determined, and a transportation roadway, a first return air roadway and a second return air roadway are arranged; 20, tunneling is carried out on a branch lane in a first mining area, and after the branch lane is penetrated, tunneling is carried out on a branch lane in a second mining area, at the same time, supporting iscarried out on a penetrated branch lane, and a communication port between the penetrated branch lane and the transportation roadway is blocked; 30, the penetrated branch lane is filled after pluggingis finished; 40, tunneling is carried out on another branch lane in the first mining area, at the same time, supporting is carried out on a penetrated branch lane in the second mining area and a communication port between the penetrated branch lane and the transportation roadway is blocked; 50, the penetrated branch lane in the second mining area is filled after plugging is finished; 60, steps 10to 50 are cycled until the branch lane is completely filled; and 70, after filling is completed, reserved coal pillar lanes are successively mined according to the direction from the far end to the near end.

Description

technical field [0001] The invention relates to the field of coal mines and mining methods, in particular to a full negative pressure short-wall filling coal mining method. Background technique [0002] my country's production mines "three under" coal pressure amounted to 14.3 billion tons. With the rapid development of my country's economy, the development and utilization of coal resources are getting higher and higher. Under buildings, under railways, under water bodies and above confined water ("three Next up") coal mining has become the main problem faced by coal mining. For a long time, my country has mainly used several methods such as village relocation, strip mining, water-sand filling, and overlying rock separation layer grouting. On the one hand, it is difficult and expensive to acquire land for village relocation, which has brought a heavy economic burden to coal mining enterprises; due to the large relocation distance, it has brought a lot of inconvenience to far...

AI Technical Summary

Problems solved by technology

On the one hand, it is difficult and costly to relocate the land for village relocation, which has brought a heavy economic burden to coal mining enterprises; due to the large relocation distance, it has brought a lot of inconvenience to farmers in production and life

On the other hand, the traditional filling mining method has backward technology and high filling cost, which is difficult to maintain and promote

The coal gangue produced by mining and the fly ash produced by coal burning in power plants have also brought about a series of problems such as air pollution, water pollution, and occupation of cultivated land.

Images