9Hoek.E,Grabinsky.M.W,Diederich MS.Numerical madeling for underground exeavafion.Inst Min&Metal.1991.
10T.G.Sitharam,G.Madhavi Latha.Simulation of excavations in jointed rock masses using a practical equivalent continuum approach[J].International Journal of Rock Mechanics and Mining Sciences,2002,39(4):517-525.