ON THE STRESS STATE IN ROCK BURST
Zhang Jinming\ \ Zhang Qing(Civil Engineering College,Hehai University,Nanjing,210098)Li Yanbing(North China Institute of Water Conservancy and Hydropower,Zhengzhou,450045)
By means of the stress state analyses on the rockmass surrounding openings ,the stress state of rock burst and the limiting depth of rock burst in rocks are studied. The paper analyses the effect of the stress route.The research result show that the rock burst of flake-splitting patern takes place around the opening's surface under the biaxial compressive stress state whereas that of shearing-dislocation patern takes place inside the rockmass. Rock burst's limit depth reduces with the ratio increase of the level and vertical crustal stress, and the rock burst,to a certain degree,is behind schedule .
【CateGory Index】： TU457