A discrete element damage model for rock slopes

Abstract

A modelling approach for rock slopes is proposed that is based on discrete element formulation. This model allows damage to occur and propagate within intact rock blocks and along discontinuous joint sets. The model uses traditional shear strength failure criteria and joint stiffness parameters. The discrete element modelling methodology has been applied to direct shear box test results and several rock slopes to examine the capabilities of this modeling approach. The role of tensile strength on slope instability has been investigated and proved to be important when confining stress conditions are low such as in toppling slope failure.