Abstract: This study contains the results of simulation the slopes deformation process with equivalent materials. It provides basic areas of mass deformation and fracture, identifies empirical dependence of the deformation value on the pit depth and these results are compared to earlier obtained results of the numerical simulation. The objective of this simulation is improving the accuracy of the information about deformation processes by ensuring rock mass fall parameters management. The concept of this method is described below. Rock in the open-pit side is modeled from synthetic materials which are choosing in such a way that physical and mechanical properties of these materials would in a certain way, correlate to the physical and mechanical constants of simulated rock. The obtained information about rock mass stress-strain behavior will provide a possibility to predict the state of rock mass slope and reduce the risk of technogenic accidents occurrence.