Mutual interference of layer plane and natural fracture in the failure behavior of shale and the mechanism investigation - A numerical study

Abstract

• PFC-based numerical model are conducted to simulate the failure behavior of layered shale with natural fracture under Brazilian tests. • Complex interference of layer plane and natural fracture in failure strength and fracture pattern of shale are clarified. • Damage modes, micro cracks and sensitivity of tensile/cohesion strength are recognized quantitatively during loading/failure process.