FIELD: drilling and blasting operations; various fields employing blasting operations in rock mass.
SUBSTANCE: proposed method includes preliminary positioning of waterproofing envelope in flooded well and forming the explosive charge in it whose density exceeds density of water. After forming the lower part of explosive charge, elastic envelope with weighting material and chemical reagents located inside it is lowered into waterproofing envelope; chemical reagents contained in envelope evolve gas at interaction. After elastic envelope has been filled with evolved gases, upper part of explosive charge is formed above it. Mass of weighting material is so selected that negative buoyancy of elastic envelope partially filled with gas might be ensured. Amount of chemical reagents is so selected that elastic envelope filled with evolved gases might take required height in explosive charge.
EFFECT: enhanced efficiency of explosive crushing of rock due to gas gap in explosive charge.
3 cl, 4 dwg
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