FEM analyses for layered rock mass using modified Hoek-Brown failure criterion
ZHANG Yujun，ZHANG Siyuan
(State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics， Chinese Academy of Sciences，Wuhan，Hubei 430071，China)
Aiming at the Hoek-Brown failure criterionwhich can be used for an anisotropic rock material，the alterative form for numerical computation is derived，and this form is introduced a 2D FEM code for elasto-plastic analysis of transversely isotropic medium. Taking an assumed rectangular underground cave in a layered rock mass as the computation background，the displacements，the stresses and the plastic zones in the surrounding rock mass are analyzed numerically through changing the dip angle of the bedding surface of rock mass. The results show that the orientation of the bedding surface of rock mass is limited in some angle range，the plastic zones can or cannot occur in the surrounding rock mass，so the anisotropic characteristics of deform and strength of layered rock mass have strong influences on the mechanical state and the stability of surrounding rock mass of a cave.
张玉军，张思渊. 对层状岩体使用修正的Hoek-Brown破坏准则的有限元分析[J]. 岩石力学与工程学报, 2017, 36(S1): 3307-3313.
ZHANG Yujun，ZHANG Siyuan. FEM analyses for layered rock mass using modified Hoek-Brown failure criterion. , 2017, 36(S1): 3307-3313.
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2017, Vol. 36 
