ABSTRACT
During the construction and exploitation of underground mine workings is important their reliability, that takes into account the random deviations of calculated values from their average values. At calculation of stability of underground mine workings deterministic values of physico-mechanical properties of the containing rock massif are replaced by random. Numerous scientific researches devoted to the solution of this task, the main results of which belong to Rzhanitsyn A.R., Bolotin V.V., Shashenko A.N. and others (Shashenko 1988). It is established that with increasing depth of mining during the operation of solid mineral deposits increases the stresses on the contour of mine workings. This leads to decrease in rates of preparatory and cut works and causing more accidents.
