Deformation characteristic and stability analyses of layered rockmass

Layered rockmass which is always met in underground engineering has obvious anisotropic mechanical properties.Compared with the isotropic rockmass,its failure features are more complicated.According to the geologic reconnaissance and in-situ stress measurement of Gonghe tunnel,the tunnel rockmass bias pressure has close relationship with in-situ stress and lithology.By the monitoring and detecting of the convergence displacement of surrounding rock in section of failure of primary support,surrou...