MODELLING AND ANALYSIS OF HILL SLOPES

Abstract

The numerical behaviour of a jointed rock mass is strongly, and sometimes dramatically, affected by the behaviour of the discontinuities present in jointed rock mass. in many cases, preferential failure are dominated or defined by the natural discontinuities present in the rock mass. The numerical methods are used for analyses of rock engineering problems. Distinct element method (DEM) is a powerful approach in modelling the behaviour of fracture rock mass. This method can account for large displacement and rotation of rock blocks and is more useful for the field of rock engineering. Other method like Finite Element Method, Boundary Elements Methods etc. can attempt to model the discontinuities but this method gives the limited representation or jointed rock mass. The present work is an attempt to use the distinct element method to evaluate the displacement in the rock slope. The Finite element method is used to calculate factor of safety and failure pattern of joint discontinuities. Two dimensional distinct element codes (UDEC) and finite element method has been used for the analyses. The effect of joint parameters (cohesion and friction angle) on stability of slope is studied. The effect of joint orientation on the slope stability is also studied using the FEM software (PHASE2). The results are presented in the form of displacements and factor of safety.