Study of Damage Evolution in Joint Rock Mass Construction Using Time-Variation Mechanics
Wang Huaning, Cao Zhiyuan
(Key Laboratory of Solid Mechanics of MOE£¬Dept. of Engineering. Tongji University, Shanghai, 200092)

Abstract: Based on the established rock damage model and theory of time-variati on mechanics, the stress and strain calculation is processed according to the different path of excavation in this paper. In order to predict the damage state of later step and find the better path of excavation, computer simulation of dam age evolution is given also. Theoretical and numerical analysis show that the last stress strain and damage field are different in different construction path when the damage evolution is considered.
Keywords: Joint rock mass, damage evolution, time-variation mechanics.