Shear Failure Mechanism of Infilling Rock Joints and its PFC Simulation

Abstract:

Infilling rock joints widely exist in natural rock masses, and the shear failure of infilling rock joints plays an important role in the instability of rock masses. In order to study the shear failure mechanism of infilling rock joints, Particle Flow Code is used to simulate the direct shear test of infilling rock joints. The PFC models with different infilling thickness are established firstly, and then the procedures of PFC simulation are described. In the end, the shear failure process of infilling rock joints with different infilling thickness is simulated. Based on the PFC simulation results, it can be concluded that the shear failure mode changes with increasing infilling thickness, and the shearing of the infilling rock joint rarely gives birth to microcracks in rock due to the existence of the infilling material.

• Periodical: Applied Mechanics and Materials (Volume 723)
• Pages: 317-321
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.723.317
• Online since: January 2015
• Authors: Lei Xu*, Qing Wen Ren
• Keywords: Micro-Mechanism, PFC, Rock Joint, Shear Failure

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