Abstract
The task of the study is to determine the parameters of the unstable-deformed state of the rock mass around the targets and the chamber at various angles of occurrence of the ore body. A vertical section of a rock mass is considered. The deformation along the chamber can be neglected and the task is reduced to flat. The number of methodical finite elements is taken as the solution method. To solve the problem, the characteristic conditions of cleaning chambers and tar-gets are modeled. The geometric parameters of the design scheme succeeded with the maximum approximation to real conditions. The characteristic of a solid body and host rocks is given by the modulus of elasticity, Poisson's ratio, and volumetric weight.