Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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THE METHOD OF DETERMINATION OF BLAST AND DEEP-HOLE CHARGES BLASTING PARAMETERS ALLOWING TO EXCLUDE SUPERFLUOUS DRILLING AND MINIMIZE THE OVERSIZE YIELD

Andriyevskiy A.Р. 1 Zuyev A.Е. 1
1 Federal State Budget Institution of Science “Institute of Chemistry and Chemical Technology”
The article describes the methodological position on determination of blasting parameters for stope excavation and construction of underground mine workings with wedge cuts for the various geological, mining and technical conditions. At the explosion of core charge the zone of controlled rocks crushing is formed as a complex figure in the rock massif, with determination of blasting parameters being based on the fact. The zone can be formed in case the blasting load time is sufficient; otherwise, the zone is limited by the longitudinal wave front, passed over the period of the blast load. Thus it is possible to determine the superfluous drilling for borehole fractures or completely eliminate it. The method is proposed to determine the amount of these charges for fixed lines of the least resistance of borehole breaking (the first row of holes on a ledge) and the number of wedge cut holes in the construction of mines, that takes into account the mutual influence of both simultaneously blasted charges.