FIELD: breakage of rocks in mineral opencast mining. SUBSTANCE: method includes breakage of rock by physical blast due to reaction in hole of cryogenic fluid inform of nitrogen with molten halite or sylvinite. Melt is obtained in artillery barrel by induction heating and ejected into hole filled with liquid nitrogen to destroy membrane at muzzle end face. In this case, artillery barrel lowered into hole to depth exceeding length of recoil of barrel in physical blast serves as stem. EFFECT: higher reliability of method realization. 2 cl, 1 dwg
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