ROCKBURSTING CHARACTERISTICS AND STRUCTURAL EFFECTS OF ROCK MASS

This paper is concerned with the rockbursting characteristics and the structural effects of the rock masses in the diversion tunnel of Tianshengqiao Hydropower Station. The controlling effect of rock mass structure on the occurrence and intensity of the rockburst is demonstrated. At the same time the theory of rock mass structural effect on rockbursting bas been advanced with rock mechanical tests carried out by the author. It laid the foundation of the correct selection of the underground project sites where occurs no rockburst, and it also laid the foundation of adjusting the tunnel axes to reduce the rockburst intensity and predicting the rockburst under the construction of underground projects.