Method for analyzing normal fault mining effect of overburden hard and thick rock face

Abstract

A method for analyzing normal fault mining effect of overburden hard and thick rock face includes such steps as S1, establishing UDEC numerical model of relative position relationship between overburden hard and thick rock face and normal fault, setting up UDEC numerical model of overburden hard and thick rock face, setting up UDEC numerical model of relative position relationship between overburden hard and thick rock face and normal fault, and setting up UDEC numerical model of overburden hard and thick rock face; S2, obtaining displacement change curves of that hard thick rock layer and theunderlying rock layer and mining stress change curves of the hard thick rock layer; S3, obtaining the change curve of mining to the stress state of the hard thick rock stratum fault plane and the change curve of mining to the slip amount of the hard thick rock stratum fault plane. The invention solves the problem that the prior art lacks the research on the effect of the fault on the hard and thick rock strata, in order to study and analyze the normal fault mining effect of overlying hard and thick rock face, it is beneficial to further reveal the mechanism of rock burst induced near the fault, and to provide scientific basis and technical support for the study of rock burst, coal and gas outburst, roof control of rock pressure under similar complex geological conditions.

Description

technical field [0001] The invention relates to the field of numerical simulation of rock burst, in particular to a method for analyzing the mining effect of a normal fault on an overlying hard and thick rock working face. Background technique [0002] A large number of rock burst accident statistics show that areas with more developed faults are more likely to induce dynamic disasters such as rock burst, mine earthquakes, and coal and gas outbursts. According to the coal rock structure characteristics of rock burst mines, the coal seam with impact risk often has a thick and hard roof above it, and the mining has obvious compression effect on the coal body, which makes it easier to concentrate stress in the coal rock body, and Accumulate a large amount of elastic strain energy, once the elastic strain energy accumulated in the coal rock body is released suddenly, the impact instability of the coal rock mass will be induced. [0003] Hard and thick rock formations and faults...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for analyzing the mining effect of normal faults in the working face of overlying hard and thick rock formations, aiming at solving the problem of lack of research on the influence of faults on hard and thick rock formations in the prior art, and for researching and analyzing overlying hard and thick rock formations. A theoretical basis for the mining effect of normal faults in rock working faces

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