DETERMINING THE MAIN FACTORS THAT MEASURE THE EFFICIENCY OF THE TECHNOLOGY OF STONE BLOCK EXTRACTION BY PERCUSSION MACHINES

This paper presents the main factors influencing the efficiency of rock destruction by impact loading along the contour during mining of blocks in strong rocks, such as the magnitude of impact loading (energy of a single impact), geometric parameters of the working tool, parameters of the fracture scheme, etc. Approaches applied by research institutions in mining science have been scrutinized. A methodology of experimental work to determine the main parameters of fracture depending on the force, energy, and design parameters of the tool is developed. The graphs of dependence of specific energy consumption on the height of the craggy layer as well as of dependence of specific energy consumption of destruction on the energy of a single blow A and of specific energy consumption of marble destruction by a chisel on the height of the craggy layer and change of work value A on the depth of wedge penetration h into the rock are presented.

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