Method for supporting goaf roof of underground coal mine

Abstract

The invention discloses a method for supporting a goaf roof of an underground coal mine. The method for supporting the goaf roof of the underground coal mine comprises the following specific steps that S1, two rows of installing holes are formed in the top of a goaf in a rectangular mode; S2, roof anchoring rods are inserted into the installing holes; S3, a metal net is installed at the tops of the roof anchoring rods, and a tray is installed at the bottom of the metal net; S4, a pasty material is filled between the tray and the metal net by utilizing the effect of pump pressure or weight; S5, after the pasty material solidifies, a displacement sensor is installed on the pasty material. The supported roof density is high, a mining subsidence control effect is good, an application range is wide, meanwhile waste coal gangues produced during coal mining are utilized as aggregates of the pasty material, and the waste transportation amount is decreased. Anchor net guniting combines with supporting, the bearing capability of a goaf rock stratum is improved, the surface subsidence problem of a mining area is effectively inhibited, and a working environment is improved.

Description

Technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for supporting the roof of a goaf in a coal mine. Background technique [0002] At present, coal mining methods for preventing the roof (including straight roof and old roof) from collapsing in the goaf area of ​​coal mines generally include the filling method and the coal pillar support method according to the nature and thickness of the roof. The filling method mainly includes: as the working face advances for a certain distance, when the rock strata in the goaf area begins to be exposed from the open cut, the filling material is sent to the goaf area, and the goaf area is filled to support the roof and make the roof directly , The old roof is not completely collapsed. The current filling method solves the problem of reducing the deformation and damage of the roof of the goaf to a certain extent, but the problem with the filling of the goaf is that the roof may collapse...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for supporting the roof of the goaf in the underground coal mine, so as to solve the problem of adopting the caving method to mine coal resources under the ground buildings in the above-mentioned background technology, and the result is that the ground on the mine is subsidence. , the problem of building ground damage

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