FIELD: drilling and blasting operations, applicable in various branches using blasting operations in hard rock masses.
SUBSTANCE: the method consists in separation of an explosive charge into parts by an air gap from foam polystyrene. The air gap of the rated height is formed by dipping of a bulk of foam polystyrene into a borehole, it is tightly packed in a cloth or polyethylene casing with a diameter not exceeding 0.8 of the borehole diameter with a weighting compound in the lower part from pieces of rock or borehole slime with a thickening bulk of explosive on it placed in a soft or elastic casing with a diameter not exceeding the borehole diameter.
EFFECT: simplified forming of air gap from foam polystyrene in an explosive charge.
3 dwg
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