Surrounding-rock control method of fully-mechanized coal-mining working-face end roof under mining disturbance

Abstract

The invention provides a surrounding-rock control method of a fully-mechanized coal-mining working-face end roof under mining disturbance, and belongs to the technical field of mining. The method includes the steps: 1, obtaining parameters of a roadway working face to be controlled; 2, according to the parameters of the roadway working face, calculating roadway surrounding-rock stresses; 3, drawing an analytical diagram of the roadway surrounding-rock stresses, and determining a roadway surrounding-rock stress concentration area; 4, in the roadway mining process, conducting decompression on the roadway surrounding-rock stress concentration area. Under the mining disturbance in a mining period, the probabilities are reduced that two end roofs have accidents like rib spalling and roof caving, and the method ensures the normal propulsion of a machine head and tail and the smooth moving of a lead end bracket.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for controlling surrounding rock when the end top plate of a fully mechanized mining face is disturbed by mining. Background technique [0002] The traditional roadway often adopts the joint support method of anchor + metal mesh + steel belt + anchor cable. Control the deformation of the roof and two sides of the roadway, but affected by the mining of the working face and the periodic pressure of the roof, the coal sides at the top corners at both ends will loosen and become unstable, and the ability of the coal wall to carry the overlying roof strata will gradually lose. The top plate at the place is broken and subsides seriously, and when the working face passes the nose and tail, there are often phenomena such as sidewalls, roof fall, and difficulty in moving the head and tail ahead of the front support, which affects the normal advancing speed of the worki...

AI Technical Summary

Problems solved by technology

[0002] The traditional roadway often adopts the joint support method of anchor + metal mesh + steel belt + anchor cable. Control the deformation of the roof and two sides of the roadway, but affected by the mining of the working face and the periodic pressure of the roof, the coal sides at the top corners at both ends will loosen and become unstable, and the ability of the coal wall to carry the overlying roof strata will gradually lose. The top plate at the place is broken and subsides seriously, and when the working face passes the nose and tail, there are often phenomena such as sidewalls, roof fall, and difficulty in moving the head and tail ahead of the front support, which affects the normal advancing speed of the working face. The problem of support at both ends of the face and ensuring the normal advancement of the working face are problems that need to be solved urgently in this mine

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