FIELD: mining industry. SUBSTANCE: method includes extraction of blasted rock mass by benches from top to bottom, loading it onto transport facilities and its transportation to surface. Formed on each bench, beginning from the second one, rock and ore ramps on edges of open pit field and ramp sections on edges with inclination angles less than 40-45 deg. are equipped with devices for regulation of mined bulk delivery to underlying horizons. Muck from upper bench is transported to ramps and passed to lower concentration horizon. After working of bench, devices of underlying bench are dismantled and this bench is extracted in similar manner. Mined bulk is transported from lower concentration horizon. EFFECT: higher efficiency. 2 dwg
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Authors
Dates
1994-05-15—Published
1991-07-01—Filed