FIELD: mining.
SUBSTANCE: method involves drilling of blast holes with increased subdrilled area, their charging with an air cushion arranged in the above subdrilled area, and explosion of mine rocks. Air cushion with length of 6-10 diameters of the well is created below actual level of bench bottom by 2-3 diameters of the well. Additional charge with length of 10-20 diameters of the well is arranged under the cushion.
EFFECT: improving the efficiency of charges.
3 dwg
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