Finite Element Analysis on Damage Progress by the Unloading of Surrounding Rock and Stress Field Regulation
LIU Ting-jin et al.
In this paper by introducing the rock micro unit conforming to Weber distribution function, using the theory of damage mechanics of continuous media, a formula of constitutive relationship expressing the heterogeneity of the rock is obtained. Then, using the RFPA analytical system for the rock disruption and destabilizing process, a finite element analysis was carried out on the whole process of damage progress and stress field regulation occurred at rock near the tunnel wall surface during unloading of the rock due to tunnel excavation in underground projects such as tunnel cavern etc. A diagram of the process of rock damage progress and regulation of stress field regulation has been obtained.
【CateGory Index】： TU457;TB