Formulation and application of a short-term strength criterion for isotropic rocks

摘要: This paper deals with failure of low-porosity rocks and a multiaxial representation the corresponding surface in stress space. The proposed criterion is based on mathematical modification MSDP function recently developed by same group. three-dimensional has been reformulated so that it can be expressed unified manner, without having to resort transition condition between curved portion (referred as Mises-Schleicher portion) linear Drucker-Prager portion). new following characteristics: forced passage through uniaxial strength tension ( σt) compression (σc ), continuous influence minor principal for entire range behavior considered, under high confining controlled basic friction angle φb, loading-geometry effect π plane. expression presented paper. Its main characteristics are also shown, together its application various using number testing results taken from literature. In discussion follows, other attributes highlighted qualitative comparison Hoek-Brown criterion.