FIELD: mining of mineral raw material, applicable at opening of workings or manbreaking.
SUBSTANCE: a trapezoidal recess is made in the cartridge-shape charge of blasting destruction obliquely to the longitudinal axis of the charge. The recess is positioned at the cut of the generating line and the change end face. In the charged blast-hole (or well) the recess is directed towards the non-charged blast-hole or towards the additional exposed plane.
EFFECT: enhanced utilization factor at opening of workings and holes at mass breaking.
8 dwg
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