Low-position grouting and filling method for gangue slurry on coal face

Abstract

The invention discloses a low-position grouting and filling method for gangue slurry on a coal face. The filling range of a low-position grouting and filling mode in a goaf can be greatly expanded, and then efficient and low-cost emission of coal gangue is achieved on the premise that normal production of a mine is not affected. Flexible grouting pipes are adopted in an auxiliary transportation roadway and the goaf for low-position grouting and filling, so that the section-by-section dismounting and mounting procedure of traditional rigid grouting pipes is avoided, the arrangement efficiency of the grouting pipes is improved, the arrangement range of the grouting pipes is expanded, equipment guarantee is provided for implementation of a mining and filling parallel process, and the restriction of filling on coal mining is further reduced.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a low-level grouting method for gangue slurry in a coal mining face. Background technique [0002] Coal mining enterprises produce a large amount of coal gangue in the production process. The traditional solid waste treatment methods are surface accumulation or comprehensive utilization. However, as environmental protection requirements become stricter, coal gangue is used as filling material for goaf filling and is gradually being promoted in coal mines. application. At present, the solid filling of the working face, the paste filling of the working face, the roadway filling and the slurry pipeline filling are the mainstream goaf filling methods, but the first three have great limitations and have a great impact on the normal production of the mine. The slurry pipeline filling has irreplaceable advantages in terms of filling efficiency, filling cost and not affecting the normal ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the pipelines can only be arranged in the two mining lanes of the mining work, and the grouting and filling cannot be bent, so the diffusion range of the gangue slurry in the goaf is reduced, the filling amount of the gangue slurry is reduced, and the waste rock slurry is reduced. In order to solve the problem of filling efficiency, the present invention provides a low-level grouting method for gangue slurry in coal mining face, which can realize high-efficiency, green and low-cost filling of gangue without affecting the normal production of the mine.

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