Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift

Abstract

The invention discloses a pressure relief and consolidation synergizing prevention and control method for rock burst in a deep coal drift. According to the method, based on deep hole photographic detection and analytic processing technology, discontinuous rupture distribution of the surrounding rocks in the deep coal drift and the evolution law of abutment pressure with mining are firstly detected, the deep hole blasting depth is determined according to the detection results and the pressure generated by deep blasting is relieved, and the range and consolidation method of barrier layers of the shallow surrounding rocks around the roadway surrounding rocks are finally determined; therefore, optimal synergy of pressure relief and consolidation is realized and and the aim of prevention and control of the rock burst in the deep mining coal drift is achieved.

Description

technical field [0001] The invention relates to a method for preventing and controlling rock burst during coal mine mining. Background technique [0002] With the transfer of coal mining to deep mining, the rock burst in my country's coal mines is becoming more and more serious, and the rock burst in coal roadways accounts for about 80% of the total. How to effectively prevent and control the deep coal roadway (rock burst) at a distance of more than 800 meters from the surface has become one of the important bottlenecks in the safe mining of deep coal in my country. [0003] At present, the prevention and control of roadway surrounding rock burst mainly focuses on three aspects: monitoring and early warning, coal pre-fracture and surrounding rock reinforcement. In terms of rock burst monitoring, there are microseismic, acoustic emission (ZL91204948), electromagnetic radiation, etc. [0004] The coal body pre-cracking treatment method mainly includes after the coal mining f...

AI Technical Summary

Problems solved by technology

[0007] First, when the deep hole blasting is loosened and blasted, the depth of the deep hole blasting and the best blasting time cannot be scientifically determined;

[0008] Second, it is impossible to determine the surrounding rock thickness and safety of deep coal roadway through strengthening support to prevent rock burst;

[0009] Third, it is not suitable for the discontinuous damage area along the thickness direction in the surrounding rock of deep coal roadway

[0010] The fourth is that blasting pressure relief and reinforcement are not considered as a whole, but pressure relief and blasting are separated to prevent and control rock burst in deep coal roadways

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