Constitutive models in stability analysis of rock slope

Equivalent Mohr-Coulomb yield criterion was established, and the relationship between different constitutive models was studied. The application of equivalent Mohr-Coulomb yield criterion in Ansys was achieved by means of transforming material parameters. The stability research aiming at the most common rock slope without conspicuous slide surface was accomplished, the methods of measurably assessing the stability of rock slope without conspicuous slide surface were explored, and the disadvantages of method of minimum slide-resisted reserve as dangerous slide path were pointed out. The results show that through the calculation and analysis of cases, the conception that measurable assessment of the stability of rock slope without conspicuous slide surface can be achieved under condition that equivalent Mohr-Coulomb yield criterion is validated. Its safety parameter formula is explicit in theory and credible in results. The results obtained are approximate to those obtained by using finite element intensity reducing method.