| 摘要 |
FIELD: mining art, applicable at destruction of rocks. SUBSTANCE: the main difference from the known methods for blasting crushing of rocks is the placement of the explosive charge with at least one spacing relative to the hole wall in its length, the charge volume makes up 0.3 to 0.95 of the volume of the hole active section; the cross-section area of the explosive charge is selected proceeding from condition S3=(1,13-2,84)r2hole, [sq.m]; the cross-section radius of the explosive charge is selected proceeding from condition R3=(0,55-0,95)rhole, [m]. EFFECT: enhanced efficiency of the destructive action of the explosive charge due to the increase of the utilization factor of the explosive charge energy for crushing of rocks. 11 cl, 10 dwg
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