Coal wall spalling and roof fall control technology in longwall and large mining height working face with large dip angle coal seam

Abstract

The invention discloses a steep coal seam long-wall large-mining height workface coal wall caving and roof caving control technique. The control technique comprises the following steps: guaranteeing the stability of a coal wall on the workface by adopting a bracket working resistance control technique and a coal wall preceding pre-reinforcement technique in a coal seam mining site; solving the problem of mining of the workface under a hard roof condition by adopting a roof coupling detonation caving technique; guaranteeing a false inclination angle to be within a control range by adopting a small false inclination angle workface arrangement method; and mastering workface roof weighting rules by adopting a full-time dynamic workface mining pressure monitoring technique so as to ensure that the possibility of coal wall caving in different stages can be predicted accurately. The technique disclosed by the invention has the beneficial effect of effectively improving the occurrence times of caving and roofing of a steep coal mine.

Description

technical field [0001] The invention belongs to the technical field of coal seam mining, and relates to a coal wall slab and roof fall control technology of a long wall and a large mining height working face of a large dip angle coal seam. Background technique [0002] The high-dip coal seam refers to the coal seam with a burial dip angle of 35°-55°, which occurs in all major mining areas in my country. Research and practice have shown that since the mechanized mining of high-inclination coal seams has been realized, long-wall fully mechanized caving mining has been used for high-inclination coal seams with a thickness of more than 3.5m. Problems such as low mining efficiency and complex processes have not been fully resolved. Most of the mining areas under Xinjiang Coking Coal Group have high-dip coal seams. Since the mine was established, it has been engaged in the practice and research of mechanized mining of high-dip coal seams. Now the 5# coal seam of the 2130 mine work...

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Problems solved by technology

[0006] The present invention provides the coal wall slab and roof fall control technology of the long wall and large mining height working face of the high-inclination coal seam, and solves the problems of slab and roof fall in the mining process of the high-inclination coal seam

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