Remained small coal pillar comprehensive mechanized coal mining supporting structure and construction method

Abstract

The invention discloses a remained small coal pillar comprehensive mechanized coal mining supporting structure and a construction method. The remained small coal pillar comprehensive mechanized coal mining supporting structure and the construction method comprises a narrow coal pillar arranged between a current stope working face and an adjacent stope working face, one side of the narrow coal pillar is provided with a filling body, and the adjacent stope working face is also provided with a roof presplitting cutting line; the construction method of the remained small coal pillar comprehensivemechanized coal mining comprises the following steps that before the coal mining, an air return way, a haulage gate, and an auxiliary haulage gate are constructed; the roof presplitting cutting line of the current stope working face is constructed in the auxiliary haulage gate; then the filling body is constructed synchronously with a head coal mining. The remained small coal pillar comprehensivemechanized coal mining supporting structure and the construction method solves the problems of gangue darting into a lane in a worked out section, roof bolting accident of the auxiliary transport chute, and the leakage of the narrow coal pillar in the current stope working face; and the mining influence to the auxiliary transport chute caused by the stope working face is weakened, cost of maintenance of the lane is reduced, and recovery coefficient of coal resource is enhanced; and the remained small coal pillar comprehensive mechanized coal mining supporting structure and the construction method can be applied to most geological mining conditions and has a great significance to promote and achieve safe and efficient mining of coal mine.

Description

Technical field [0001] The invention belongs to the field of mining influence control in coal mines, and specifically relates to a supporting structure and a construction method for comprehensive mechanized coal mining with small coal pillars. Background technique [0002] With the continuous development of mining technology, in order to improve the coal recovery rate, the technology of retaining roadways along the goaf and driving along the gob has been proposed. However, the roadway retaining roadways along the goaf have strict requirements for roadway support, and the amount of roadway deformation is large. The amount of repair work required is also large, that is, the cost of the roadway is higher; the support requirements for roadway driving along the goaf are lower than that of the roadway remaining along the gob, but the roadway driving is more difficult than the roadway driving along the coal seam. A series of measures need to be taken to prevent the goaf area Gangue flee...

AI Technical Summary

Problems solved by technology

[0003] At present, the section coal pillars are generally set at about 20-30m, and the section coal pillars are relatively wide, which causes a certain degree of waste of resources, and the narrow coal pillars are difficult to ensure the stability of the surrounding rock of the roadway. The impact of mining on the working face is severe, roof fall accidents are prone to occur, the maintenance workload is heavy, the cost is high, and it is easy to cause air leakage and spontaneous combustion in the goaf

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