FIELD: mining.
SUBSTANCE: proposed method comprises opening of deposit by galleries at quarry unworked edge, working of deposit in blocks with excavation of minerals by chambers, release of crushed mineral to underground openings and bringing it to grass. Note here that deposit is developed by galleries at dividing unworked edge to horizons equal to height of production bench. Charges are laid in gallery blast-holes and wells. Cut opening is produced by blasting blast-hole and well charges of the gallery central group. Rock is excavated and loaded to carries via loading funnels. Blast-hole and well charges are blasted to force the deposit of the gallery flank groups to cut opening. Conical bank of blasted rock is formed, loaded and transported. Deposits of central and two flank directions are developed to isolate prior development zones by quality of mineral stock.
EFFECT: creation of working zone in central and two flank directions at unworked edge at selective working of deposits.
3 dwg
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