FIELD: mining.
SUBSTANCE: plane of the fan is divided into arched zones, the width of which is proportionally reduced from the bottom of the wells to their mouth, the charges in the wells alternate with air gaps. The length of the charges and the length of the air gaps are assumed to be equal to the width of the corresponding zone, and the charges and air gaps are staggered.
EFFECT: invention makes it possible to reduce the specific consumption of explosives in the case of mass breakdown without deterioration of the explosion results in the quality of ore crushing.
2 dwg
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