Assessing the stability of underground workings in urban infrastructure

Abstract

This article presents the analytical formulas necessary for making optimal design and technological decisions when laying shallow underground mine workings. They make it possible to determine the following critical parameters of mine workings: the critical height of the lift of the arch of natural equilibrium is the surface above which the rock is in an undestroyed state; stability coefficient of the arch of natural equilibrium (it shows in what state the rock above the excavation is); critical rock pressure is the pressure that, if exceeded, causes the rock to collapse above the working without support; critical depth of the mine working; critical pressure in the pore fluid is the pressure above which the rock collapse above the working without support; design maximum rock pressure with a given safety factor; design maximum depth of the working with a given safety factor; rock pressure on the support.