HE Chuanyong, SUN Ping, WU Yongping, DUAN Qingwei

China Institute of Water Resources and Hydropower Research, Beijing 100048, China

Abstract: 3-D random joints cutting of rock mass and block analysis is the new development of block theory and has become an effective method of slope engineering and stability analysis of surrounding rock of underground caverns. Based on 3-D random fractures network simulation of rock mass, and through a series of procedures, including intersecting surfaces, new loops generation, closed block identification, all the potential removable rock blocks can be found out of all the finite blocks on the excavation surface, and the key blocks can be determined finally. By multiple simulations, the statistical characteristics of key blocks, such as geometry shape, size etc, can be achieved. The research results can provide a reliable basis for system reinforcement measures optimization of slope and underground caverns.

Key words: Block Theory; Random fractures network; 3-D Cutting; Blocks Generation

Published in: Journal of China Institute of Water Resources and Hydropower Research, Vol. 13, No. 3, June 2015