FIELD: mining.
SUBSTANCE: proposed method comprises driving preparatory and entry headings, drilling sublevels, charging and blasting wells, and releasing ore from the chamber via ore-receiving bottom heading. After producing entry sublevel drifts, and along with drilling blast wells within the limits of sublevel chambered deposit, arc drilling of wells is performed in interchamber pillars, followed by rope rods installation and filling drilled holes by hardening mix at pressure. Note here that blast hole ring is drilled over the entire width of pillar, in staggered order, not penetrating to pillar outcropping boundary for 0.5-1 m.
EFFECT: reduced ore loses, higher efficiency and lower costs.
4 dwg
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