Gob-side roadway retaining method based on roof cutting of soft roof plate

Abstract

The invention discloses a gob-side roadway retaining method based on roof cutting of a soft roof plate. According to the gob-side roadway retaining method based on roof cutting of the soft roof plate, a movable stop lever air leakage preventing device is used for assisting in roadway formation, so that roadway formation achieved by filling walls with concrete in the prior art is replaced; the adopted stop lever air leakage preventing device is an assembly, and the whole stop lever air leakage preventing device is of a square tubular structure and comprises an upper cap plate, folding air cloth, a single hydraulic prop, a steel wire mesh and a lower shoe plate; the steel wire mesh is hung on the side close to a gob; and the folding air cloth is fixed to the side close to a roadway. The stop lever air leakage preventing device and a working face advance to be dismounted and mounted synchronously and can be moved to another place to be used again, after the stop lever air leakage preventing device is dismounted and moved, liquid concrete is sprayed onto a wall formed by rocks exposed out of one side of the stop lever air leakage preventing device, and a series of technique means such as gap blocking and sealing are adopted, so that compared with a gob-side roadway retaining method in the prior art, the gob-side roadway retaining method based on roof cutting of the soft roof plate has the beneficial effects that the roadway forming speed is high, the efficiency is high, the safety performance is good, the concrete filling work amount is small, and the cost is low.

Description

technical field [0001] The invention relates to a gob-side entry retaining method, in particular to a gob-side entry retaining method under a cut roof of a soft roof, belonging to the field of coal mining industry. Background technique [0002] With the continuous mining of primary resource coal, gob-side entry retention, a very mature traditional technology, has once again become a hot research topic for technicians in the field to continue to explore, pursue breakthroughs and technological innovations. [0003] The early method of retaining roadways along the goaf was mainly to advance with the mining of the working face, and to maintain and retain the original mining roadway along the edge of the goaf by means of filling along the gob, so as to cancel the coal pillars of the roadway protection, and to use it as a gobside mining method in the lower section of the working face. Roadway use. [0004] However, because the supporting wall will be affected by the two mining op...

AI Technical Summary

Problems solved by technology

[0008] In the actual production process, the masonry or construction of concrete filling walls, on the one hand, is a huge amount of work, time-consuming and labor-intensive, and the filling cost remains high; on the other hand, concrete filling walls under such special working conditions During the solidification process, cracks or cracks in the wall are prone to occur, and inspection, maintenance and repair are very difficult; more importantly, it takes 7 days for the initial setting strength of concrete to develop, which directly restricts coal mining. The advancement speed of coal surface has become the bottleneck restricting the improvement of coal production efficiency

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