Mechanical Behaviour of Anchored Rock Containing Weak Interlayer under Uniaxial Compression: Laboratory Test and Coupled DEM–FEM Simulation

The reason for instability in a rock mass with weak interlayer is not only the sliding failure of structural plane but also tip crack propagation caused by stress concentration at interlayer. In this study, uniaxial compression test an anchored was carried out to determine influence anchorage on pattern and strength samples different dip angles. addition, coupled DEM–FEM numerical simulation method used study internal evolution sample distribution anchor under effect. results showed that effect reinforcement enhancement greatest angle 30°. Under effect, initiation limited there more shear samples. range anchors restrained ends larger than free ends. When rock–anchor interface unbonded, free-ends reflected residual friction, restrained-ends still worked limiting lateral expansion rocks. values deformation decreased gradually increase angle.