FIELD: mining.
SUBSTANCE: invention relates to mining and, in particular, to explosive destruction of rocks. Stemming of the well is provided with counter-current relative to the flow of detonation products of the main charge, movement of the detonation product flow of the additional cumulative cylindrical charge, installed in the uncharged part of the well by the cumulative recess towards the main charge at a distance from it, determined by formula, and initiated with deceleration, relative to the moment of initiation of the main charge, which is determined from the expression.
EFFECT: invention aims at increasing efficiency of breaking and crushing.
1 cl, 3 dwg
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