Goaf rapid grouting filling bag synchronous with coal cutting and coal mining method of goaf rapid grouting filling bag

Abstract

The invention relates to the technical field of coal mine mining methods, in particular to a goaf rapid grouting filling bag synchronous with coal cutting and a coal mining method of the goaf rapid grouting filling bag. The problems that in the prior art, the filing process is not synchronous and matched with the coal cutting process, the filling speed is low, the filling support effect is poor, asystem is complex, and the investment is high are solved. According to the technical scheme, the goaf rapid grouting filling bag synchronous with coal cutting comprises a bag body, a jacking type ofthe top of the bag body through a folding structure, a secondary grouting pipe is arranged on the upper part of the interior of the folding structure in a penetrating mode, connecting pieces are arranged at the periphery of the outer wall of the bag body, a plurality of water guide pipes are longitudinally arranged on the front side surface of the bag body, a plurality of internal drainage small holes are formed in the surfaces on which the bag body is in contact with the water guide pipes, drainage holes are formed in the bottoms of the outer walls of the water guide pipes, a grouting hole isformed in the middle position of the top of the front side surface of the bag body, rod penetrating pipes are arranged on upper and lower edges and middle of the front side surface of the bag body atintervals, and the problem of the prior art is solved through a certain coal mining method.

Description

technical field [0001] The invention relates to the technical field of coal mining methods in coal mines, in particular to a goaf rapid grouting filling bag synchronous with coal cutting and a coal mining method thereof. Background technique [0002] At present, the mainstream coal mining technology in coal mines is comprehensive mechanized coal mining. The regular cycle operation of the coal mining face is a three-process cycle of "coal cutting by the shearer, moving the hydraulic support, and pushing the scraper conveyor", and the roof is managed by the whole caving method. Theoretically, there are solid waste rock manual (or mechanical) filling, pipe grouting filling, etc. in the goaf filling process, but due to the safety of workers entering the gob, the system is complicated, the investment is high, the work efficiency is low, and the labor intensity is high. Problems or shortcomings such as poor filling and supporting effects, and most of them are subsequent fillings, ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the prior art that the filling progress does not match with the coal cutting progress, the filling speed is slow, the filling support effect is poor, the system is complex, and the investment is high, the invention provides a goaf rapid injection system synchronous with coal cutting. Slurry filled bag and coal mining method thereof

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