NUMERICAL SIMULATION OF PILLAR FAILURE PROCESS AND STABILITY ANALYASIS

摘要

Roof falling and floor heave of roadway and pillar failures are important problems of rock mechanics in mining engineering. In this paper, a numerical code, Realistic Failure Process Analysis (RFPA) developed based on finite numerical analysis method, is applied to simulate the deformation and failure process of the pillars in deep tunneling rock mass. The study focuses on the dip angle of deep tunnels that has significant influence on tunnel stability. The simulated result shows that the dip angle of the laneway plays a significant role in the failure of pillars, and an increase in dip angle may initiate asymmetrical failure at the pillar roof contact on the up-dip side of a room. It suggests that RFPA can be applied to model the pillar and room failure behavior in complicated rock masses.