Mining area underground rock stratum migration control method

Abstract

The invention discloses a migration control method for an underground rock stratum in a mining area, which solves the problem of surface subsidence of the mining area caused by a goaf formed by later mining of the mining area by adopting a mode of performing full-length anchoring on an overlying rock stratum above a to-be-mined layer in advance in the burial depth height direction of the to-be-mined layer before mining of the mining area. Each anchoring vertical shaft unit assembly comprises a plurality of rock stratum anchoring convex ring structures formed by filling rock stratum anchoring holes with anchoring slurry, and all the anchoring vertical shaft unit assemblies which are arranged according to a set array pitch form a group anchoring effect on an overlying rock stratum together, so that the anchoring strength and effect of the overlying rock stratum can be ensured; in the later-stage ore bed mining process, the mode that the bottom ends of the exposed anchoring columns are connected with a top plate of the goaf in an anchoring mode is adopted, the top plate of the goaf is supported, and the migration amount of rock strata above the goaf can be reduced to the maximum extent; and thus, the problem of mine area surface environment damage caused by the underground goaf is avoided to the greatest extent.

Description

technical field [0001] The invention relates to a method for controlling the migration of underground rock formations in a mining area, in particular to a method for controlling the movement of rock formations above it caused by underground goafs formed by underground mining, and belongs to the technical field of mining area management. Background technique [0002] In underground mining, underground mining is still the main mining method. Taking coal mining as an example, underground mining accounts for 60% of the world's coal production. In the process of underground mining, the underground ore seam is often mined and a large area of ​​underground goaf is often left. Under the action of overlying pressure and groundwater, the ore pillar and the ore seam on both sides of the mining area soften and lose strength. Not only is it easy to cause the overlying rock mass to sink, fall, and form landslides, but also the damage of the underground goaf to mining engineering is signif...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned treatment methods for goafs will inevitably lead to the migration of rock formations above the goaf, which in turn will cause surface subsidence, ground subsidence, ground fissures and other problems in the mining area, and even lead to landslides, debris flows, Destruction of surface vegetation and other forms of environmental damage

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