|
Abstract The failure process of interlayered rocks at different confining pressures was numerical simulated. A modified rigid body spring method(RBSM) was proposed to simulate the initiation and propagation of micro cracks. Both tensile and shear failures were considered with a failure criterion combining Mohr-Coulumb criterion and the tensile strength criterion. The rock material was represented by an equivalent discrete assembly of rigid blocks based on the Voronoi diagram. In order to explicitly account for the structural planes，a multi-step node insertion scheme was proposed for mesh generation. The proposed method was applied to an anisotropic artificial rock containing interlayered structures. Various failure modes and strengths were obtained with regards to the different orientations of structural planes. Simulation results indicated that the proposed model had the capacity to describe the anisotropic behaviors of strength and the failure modes in both qualitative and quantitative manner.
|
|
Received: 31 March 2014
|
|
|
|
2015, Vol. 34 
