Steeply pitching seam mining method

Abstract

The invention relates to the technical field of steeply pitching coal seam mining, and discloses a steeply pitching coal seam mining method. The steeply pitching coal seam method includes the following steps that step 1, an air return way is horizontally formed along the trend of the seam on the upper part of a section, and a transportation way is horizontally formed along the trend of the coal seam on the lower part of the section to the boundary of a mining area; and step 2, open-off cuts are obliquely arranged along the trend of the coal seam, and the angle range between the open-off cuts and the transport way is 8 degrees to 40 degrees. According to the steeply pitching coal seam mining method, a main system of the mining area, the air return way, the transportation way and a working face roadway are enabled to form complete U-shaped ventilation, meanwhile, the main system of the mining area, the air return way, the transportation way, the working face roadway and a mining system jointly form a high-efficiency, high-yield and safe long-wall mechanized mining working face based on the coal mining process, non-minable coal seam becomes mineable coal seam again, a ventilation system cannot be damaged with the mining of the coal seam, the mining efficiency of the coal seam is greatly improved, the safety is improved, and the level of automated mining is improved.

Description

technical field [0001] The invention relates to the technical field of steeply inclined coal seam mining, and relates to a steeply inclined coal seam mining method. Background technique [0002] The traditional hydraulic support, shearer, and scraper conveyor three-machine matching longwall mining face, the support arrangement is that the support top beam supports the top plate, the support base supports the bottom plate, and the support top beam and base are parallel to the working face (i.e. Cut eye) bottom surface, that is, the bracket is arranged as a C-shaped structural bracket. The three machines composed of hydraulic support, shearer and scraper conveyor are arranged along the coal seam tendency and advance along the coal seam direction. The coal shearer mines the coal in the front coal wall of the support along the coal seam direction. As the inclination angle increases, the sliding force along the working face also increases, and the difficulty of operation and mai...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method for mining steeply inclined coal seams, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the ventilation problem in the mining of steeply inclined coal seams. There is no matching reliable and practical three-machine mining equipment and matching mining technology issues

[0007] The present invention further solves the labor-intensive problem that the lower cover bracket gradually enters the transport trough during the downward push of the flexible cover support, and the support that enters the transport trough needs to be continuously transported to the upper return air trough for support supplementation. question

Images