Kipko A. Stability of extended workings of deep coal mines in the areas of disjunctive dislocations

The thesis is devoted to the development of theoretical bases and practical rec-ommendations to ensure the stability of an arbitrarily oriented in space underground mines, which intersect the fractured water-bearing rocks in the zone of discontinuous geological disturbances. As the main way to increase reliability watered fractured rock mass, improve its physical and mechanical characteristics, it is chosen method of complex backfill of clay-cement mortar. Winze is considered as a complex system with lots of random external factors. On this basis it is proposed the criterion of its safe operation. The dependencies al-lowing calculation the basic deformation and strength characteristics for a rock mass containing blocks of rocks and cracks filled with clay-cement mortar. Based on the mathematical and physical modeling of motion of viscous-elastic liquid through the fractures with porous walls, the basic requirements to the solutions are formed; their recipe made up and ways to manage their properties are suggested. Dependencies allowing calculation the basic parameters of clay-cement solu-tions injection technology in the flooded fractured rocks are offered. Geomechanical model for the underground workings of randomly located in space as they cross the disjunction of geological disturbances are developed. Problem of evaluation the stress-strain state of the adjacent rock mass is solved with use of fi-nite element method. The dependencies allowing assessment the degree of destruc-tion of edge array, determination of the length of the construction with reinforced lin-ing systems and calculation of the load on the lining are achieved. The method for calculating the parameters of backfill technology and strength-ening structures lining is developed.