Korobiichuk V. Development of scientific basis of technology of associated extraction units in breakstone granite quarries.

The thesis is devoted to solving actual scientific-practical problems of development of scientific bases of technology of associated extraction units in breakstone granite quarries, which relies on seismic safe developed technologies for short-delay blasting in the design of mass blasts in a quarry providing the allowable level of cracking in areas that are suitable for the extraction of block stone, and non-blasting technologies of extraction of block stone. The work has developed the technique of the geometrization of natural stone massif with the aim of obtaining a comprehensive model of the deposit and outline perspectives for accompanied mining of facing stone blocks on the basis of studies of reduction of the strength of natural stone with multiple non-destructive load. The classification of natural stone, taking into account the specific energy of destruction is developed. The allowable stress values of tension and speed fluctuations of the granite foundations of a block of stone ledges under the action of seismic loads in terms of its own frequencies is first established and experimentally confirmed. The algorithm calculating and contouring the allowable magnitude of the explosions with the adjustment of their parameters in time approximation of the scope of work to pillar massif of each layer of the extraction array of breakstone products quarry is developed. Technological solutions and technical tools that increase the efficiency of production processes associated with extraction of natural stone and the classification system of development of natural stone block plots of breakstone quarries were devised. Technological schemes of extraction of natural stone blocks and permanent trenching were developed.