Based on the research results carried out earlier and updated by the new data reflecting the modern condition of mining operations at the PC “Belaruskali” mines of the Starobin deposit , shown the changes of deformation and reological properties of clay and salt rocks and forms of underground pressure appearance at the mining depths of 800 m and more.
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.
Technological scheme of selective extraction of a complex thick potash seam on the basis of cutting machine «Bucyrus Model 25 M0» is proposed. Stable pillars’ width and room dimensions are calculated. Economical effect is also presented.
