Decision algorithm for rock mechanics problems for bottom layers of potash deposits is suggested. Flow chart for the algorithm and it’s parts is shown. The algorithm represents the method to choose excavation technology for multi-layer potash deposits.
Estimation of the strain-and-stress state and displacement of the waterprotective layers in vicinity of mining excavations in conditions of SKRU-3 mine (Uralkali Group) is done. It is shown that loadings on pillars on layer Kr.II exceed 15-20 % loadings on layer AB.
The article is devoted to research of probability of sudden salt rocks outbursts on the basis of measuring of their volume shrinkage. The design scheme of the device for measuring quantity of the microincluded gases in rocks is proposed. Criteria to estimate the possibility of sudden salt rocks outbursts is revealed.