Research on application of crack line field analysis method in rock burst prevention and control
YE Ji-zhao;LIU Qi;FANG Ji-yao;HUANG Tian-cheng;Department of Architectural Engineering,Chongqing Jiaotong University;College of Earth Sciences,Chengdu University of Technology;
In order to explore and prevent rock burst,this thesis adopts the crack line field analysis method on the basis of fracture mechanics,and takes non-small range yield theory as approximate assumption,solving the elastic and plastic stress fields near the rock mode-Ⅲ crack line and redefining border of the two stress fields near the crack line. According to this theoretical solution,and combined with the occurrence characteristics of rock burst,with comprehensive analysis,this thesis puts forward the basic theory that increase crack length and decrease shear yield limit to prevent rock burst. The two theories of prevention and control have been verified in the rock burst prevention case of the western auxiliary tunnel of Jinping hydropower station project. Advanced geostress removal method and water injection method have indicated rationality of the two prevention and control theories.
【CateGory Index】： O346.1;TV554