Abstract：Based on geologic structure model and the base contact friction experiment method，the deformation and failure response of the anti-inclined slope during excavation with different gradients are studied. The results reveal the depth of the unloading zones of slope and further development with the slope excavation. Furthermore，to verify the reliability of the physical simulation results，numerical simulation is conducted for comparison. The results show that during excavation，the depth of the slope intensively unloading zones is 30–40 m；and the depth of the relaxation belt of base is 20–25 m. It is found that the fracture intensity and plastic zone distribution are decreased with the increase of slope angle under the specific situation of original intensity relaxed slope. These achievements are helpful for the slope mode optimization and design of the slope reinforcement.
