Failure Mechanism of Anti-Dip Layered Soft Rock Slope under Rainfall and Excavation Conditions

The phenomenon of toppling deformation and failure is common in slopes with anti-dip structures, especially soft metamorphic rock slopes. This paper aims to explore the instability mechanism layered landslides. Taking slope a mining area southern Qinling Mountains China as geological prototype, large-scale centrifuge model test numerical simulation based on combined finite discrete element method (FDEM) were performed. process, mode, path under rainfall excavation conditions simulated. results show that both physical new can simulate process slopes, phenomena simulated by two methods are also very close. Rainfall mainly weakens mechanical properties rock, while at toe changes stress field distribution provides space for deformation, which accelerate slope. an be described follows: bending layer–tensile fracture along layer–flexural cracking perpendicular layer–extension penetration tensile surface–sliding