Method for controlling deformation of surrounding rock of basic rimrock layer on presplitting blasting mining roadway

Abstract

The invention belongs to the field of underground construction, and provides a method of deformation of surrounding rock on a mining roadway influenced by mining and controlled through presplitting blasting. A drill hole is formed in the surrounding rock of a top plate in the mining roadway, a loading structure of continuous loading and spaced loading is used in the hole, blasting is used for acting between an upper overlaying rock layer of a mining working face and a main roof of the mining roadway to form a presplitting cutting seam, the influence of the mining working face on the mining roadway is lowered, and meanwhile a surrounding deformation monitoring section is arranged to test the effect of presplitting cutting. According to the method of the deformation of the surrounding rock on the mining roadway influenced by minding and controlled through presplittig blasting, the problem that the deformation of the surrounding rock of the mining roadway is difficult to control due to being influenced by mining can be effectively solved, and the mining roadway influenced by mining can be guaranteed to be normally used in the production process.

Description

technical field [0001] The invention belongs to a method for controlling the deformation of the surrounding rock of a mining roadway, which is suitable for the mining roadway with severe deformation of the surrounding rock affected by mining. Background technique [0002] The mining roadway is mainly a project serving the coal mining face. The deformation of the surrounding rock in the mining roadway is usually relatively small before the mining of the mining face, but the deformation and damage of the mining roadway are serious during the mining process, which directly threatens the safety and smooth ventilation of the workers. . According to the current mine pressure theory, in the process of mining, due to the periodic fracture of the basic roof in the stope roof and the periodic disturbance of the advance bearing pressure on the surrounding rock of the mining roadway, the basic roof of the mining roadway and the basic roof of the stope working face are periodically The ...

AI Technical Summary

Problems solved by technology

In some coal mines, the surrounding rock of the mining roadway is severely deformed and damaged, and repeated repairs are required, making it difficult to maintain the roadway

The labor intensity of workers is high, and the production efficiency is low, which not only increases the mining cost, but also affects the advancing speed of the working face; the safety level of the advanced support of the roadway is low, and accidents of chipping and roof fall are prone to occur, threatening the life safety of workers

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