Stupnik M. Scientific basis of stable state formation of dislocated phase-heterogeneous array with underground mining of steep-dipping ore deposits

The thesis is devoted to defining the parameters of underground mining technology with the formation of stable phase-heterogeneous array using hydrogeomechanical properties and patterns of argillaceous rocks penetration through the protective layer at the development of steep-dipping ore deposits in mines of Krivbass. It is found that with increasing of pitch angle of bedding the subsidence of bell-pit foundations decreasing and increasing the prism displacement angle leads to increase the penetration of argillaceous rocks into the stopes. Critical depth is proportional to the length of ore deposit and the empirical coefficient which varies from 0.90 to 0.75. It is obtained the dependence of the relative depth and time of argillaceous rocks penetration through rock "cushion" provided working out of bedding ore deposits. The rate of argillaceous water-saturated rocks penetration through collapsed rock array varies within 0,54-1,72. When the thickness of over-caulked layer is 12 m, the loss and choking of ore are reduced. Argillaceous rocks penetration by collapsed rocks of back is compensated by using of vertical concentrated charges. The systems of development and grounding of parameters of steep-dipping bedding deposit working out filled with water-saturated argillaceous rocks are introduced on the mine "Jubilejnaya" of PJSC "Euraz Sukha Balka." The loss of ore reduces on 3-4 % and 2-2.5 % of contamination compared to standard values. The economic effect of the introduction of development by author on the mine "Jubilejnaya" of PJSC "Euraz Sukha Balka" was 558 830,00 UAH.