Zairov Sh. Sh., Normatova M. Zh., Ravshanova M. Kh. – Navoiy State Mining Institute, Navoiy, the Republic
of Uzbekistan. Е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Recommendations are worked out over the use of rational parameters of blasting in restrained medium under the use of
emulsion explosives in production. The use of the developed parameters of breakdown and retaining wall helped to
provide the security of rock massif geological structure, increase the coefficient of efficiency for explosives, reduce
preliminary-recovery operations when blasting at a bench, and increase security and capacity of loading – hauling
equipment. Under significant thickness of deposit, the method of discrete blasting of ore and enclosing rock with natural
“screening” is advisable, which consists in the use of advantageous structural-geological and mining-engineering factors
as natural borders of blasting. In order to calculate the width and the height of blasted rock breakdown under downhole
charges explosion with the use of emulsion explosives the formulae are worked out, which include the main parameters,
which determine energetic characteristics of explosives and physical-mechanical properties of rocks.
Key words: drilling and blasting operations; blasting in restrained medium; safety of rock massif geological structure;
retaining wall height; retaining wall width; discrete blasting of ore; structural-geological factors; mining-engineering
factors; emulsion explosives.
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