Simulation analysis of elastoplastic FEM for stability of bedding rock cutting slope

Based on perfectly elastoplastic constitutive model and Drucker-Prager yield criterion, the rock mechanics theory, the numerical simulation technique of FEM and the strength reduction principle are used to simulate and analyze the stress, displacement, friction on contact surface and the stability of bedding rock cutting slope in different excavated stages. The analysis indicates that the stress field, displacement field, contact status and stability of the bedding rock cutting slope are obviously influenced by excavating effect. On each excavated face, the horizontal displacement near the slope toe is the biggest; the most dangerous contact surface focuses on the excavated slope toe where the abscission destruction firstly occurs. Also, the safety factor of the slope gets lower gradually as the slope is excavated deeper.