PROGNOSTICATION OF ROCK MASS DEFORMATIONS WITH USING «PROROCK» SOFTWARE

Abstract

Deformations of benches group with various mining and structural-geological conditions using of PROROCK software have been calculated. The possibility of an explicit modeling of fracturing and fragmentation realized in this software package allows
observing the formation of the failure body, the patterns of its formation depending on dip angle of the fissure systems.
The models of bench groups differ in the bench face angles and the angles of inclination of the fissure systems.
Three various inclination angles and fissure systems inclination angles have been examined, so the calculations have been performed for nine models. Strength properties of rocks in models have been given as a function of time and stress state, that is, the long-term strength has been taken into account. Analysis of the calculation results showed the dependence of the direction of displacements both on the fissure system inclination angle and on the inclination angle of the pit wall part. It allows the conclusion that after analyzing of displacement directions it is possible to estimate the danger grade of the observed deformations. Based on the modeling results and taking into account the structural-geological conditions, it is possible to forecast the form and the volume of the potential failure body, to determine the critical values of the displacements, beyond which the progressive failure stage of the pit wall begins.