FIELD: mining industry. SUBSTANCE: method involves ore massif breaking in an open chamber over the receiving cones ahead of the rest ore massif in the chamber that has not been undercut. The latter is broken first from the drilling entries with blast transport by wells drilled in the vertical plane at an angle relative to the ore body strike. Breaking in the underfloor pillar is performed by mass-scale explosion of wells drilled from the crosscuts in the ore body strike planes. EFFECT: higher efficiency; lower requirements in labor; lower losses. 2 dwg
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