FIELD: mining industry.
SUBSTANCE: method includes drilling, charging of blast-holes, their detonation and following extraction of detonated rock solids. Method allows to prevent wide spread falling of rock pieces during detonation by covering of detonated rock layer, and letting ore pieces fall from steep rocks during extraction is performed onto light woven mat.
EFFECT: excluded wide spread fall of ore mass pieces during explosive operations and extraction of high steep rock shelves.
3 cl, 4 dwg
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RU2265797C1 |
