STUDY OF ROCK MASS STABILITY IN PROCESS OF MINING UNDER COMPLEX MINING AND GEOLOGICAL CONDITIONS

Abstract

The determination of the optimal parameters of stable stopes and pillars to prevent the rock collapse and penetration of sand-clay masses into underground workings at Sokolovsky underground mine is an urgent problem. The way for resolving this problem has used the multivariate numerical simulation by finite element method using Rocscience RS2 software complex, which takes into account not only physical and mechanical properties of rocks and actual rock mass stresses, but also structural characteristics of the rock mass, as well as the degree of technogenic impact. As a result, the change in the stress-deformed state of the rock mass has been determined, on the basis of which the stability coefficient of the surrounding rock mass, the magnitude and direction of its displacements have been calculated, as well as zones for distributing the probability of rock mass fragmentation in specified intervals of boundary conditions have been determined. The paper determines the parameters of
stopes and pillars providing the general stability and minimizing the possibility of breakthrough of water mud masses into the workings.