FIELD: drilling and blasting operations, applicable in various branches using blasting operations in hard rock masses.
SUBSTANCE: the method consists in a preliminary arrangement of a water-proofing casing in dry borehole, forming of a non-water-proof explosive charge in it and tamping of the borehole over the water-proofing casing. Air gaps of foamed polystyrene are formed in the water-proofing casing between the parts of the dispersed explosive charge and between the upper part of the explosive charge and the stemming.
EFFECT: enhanced efficiency of the blast breaking of rocks.
6 dwg
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