FIELD: mining.
SUBSTANCE: method includes drilling of keyholes, popholes and cropper holes, placement of charges in them and blasting. The distance between cropper holes is defined mathematically depending on parameters of rock massif cracking, effect of friction between separate parts of the massif, rock pressure, physical and mechanical properties of rock massif, speed of detonation and density of explosive charging.
EFFECT: higher efficiency and level of rock safety.
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