FIELD: blasting. SUBSTANCE: drilled in broken mass are roes of holes along bench crest. Holes are charged with explosives provided with intermediate detonators. In holes located near bench crest the charge is distributed by sections. Each section is provided with separate intermediate detonator. Upper intermediate detonator is arranged higher than intermediate detonators in subsequent hole rows and at depth shorter than interval between hole rows. Charges are blasted by rows, beginning from those near bench crest. Firing intervals of each subsequent hole row are increased. EFFECT: higher efficiency. 2 cl, 3 dwg
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