Simulation analysis on Rock Mass and Supporting Effect

• 1、Hohai University, The College of Water conservancy and Hydropower Engineering

Abstract：The mid-gate chamber of spillway tunnel in GoldPing Hydropower Station has a large excavating scale and a complicated structure, as well as multiple faults in its region. These factors will have an adverse impact on stability of surrounding rock. Using Flac/3D software and our own developed interface program, based on the elastoplastic wall rock theory, we carried out numerical simulation analysis in the process of excavation and obtained the changing regularity of stress、deformation、and plastic zone development of wall rock. And on this basis, we proposed shoring advice to provide evidence for engineering design and as a reference for other related researches.

Keywords： underground chamber 3-D elastic-plastic finite element stability of wall rock support