IMPROVEMENT OF PREDICTIVE METHODS FOR CALCULATING SURFACE SUBSIDENCE DURING THE DEVELOPMENT OF HORIZONTAL ORE DEPOSITS

Abstract

An approach is proposed to determine the subsidence of the Earth's surface over the developed space, taking into account the compression deformation of the lateral faces during development under conditions of the same type and overlapping rocks. The issues of constructing a predictive profile of the mulda of displacement at the exit of subsidence to the surface are considered. The purpose of the study is to determine the subsidence of the Earth's surface, taking into account the compression deformations of the lateral faces of the treatment work. The paper proposes a method for determining the parameters of displacement, which makes it possible to predict the impact of underground cleaning operations on the state of the earth's surface during the development of shallow ore bodies, taking into account the degree of influence of absolute deformations of the pillars, the coefficient of loosening of rocks and lateral zones of the cleaning space on the amount of subsidence of the Earth's surface. The proposed predictive method for calculating the displacement of rocks and the Earth's surface is based on the construction of sliding curves in the rock mass. The degree of influence of underground mining on the surface of the earth is fixed by the construction of the arch of natural equilibrium over the development. The boundaries of the collapse vault or the vault of natural equilibrium and the zones of mulda displacement (zones of smooth deformations, zones of dangerous shifts and collapses, zones of failure formation) are established using sliding surfaces of three families. The curves of the sliding lines are constructed on the basis of rock strength certificates calculated and constructed for each lithological type of rocks separately.