Numerical Simulation of Soft Rock Creep Behavior under Coupling Influence of Temperature and Stress

Abstract

In order to investigate the deformation law of deep surrounding rock under the coupling influence of temperature, cracks and stress. We take the temperature, initial damage and confining pressure into consideration to simulate the deformation of deep surrounding rocks after mining. The numerical simulation of the creep characteristics of deep tunnel can be sum up as follows: a) the increase of temperature makes the strength decrease and the increase deformation of rock mass; b) With the increase of confining pressure, the anti-deformation ability of rock mass is enhanced and the failure mode of rock mass changes from brittle failure to plastic failure; c) The existence of cracks reduces the strength of rocks and intensifies the deformation of rocks; d) the stress in the tunnel mainly concentrates on the tip of the initial cracks and the existence of defects aggravates the deformation inside the tunnel.