METHOD OF OPEN PIT COMPLETION Russian patent published in 2009 - IPC E21C41/26 

FIELD: mining.

SUBSTANCE: method includes transporting of ore mass from entry of working horizons to transfer point in open pit along exits and from sump of transfer point to surface. Also out-sized rock mass, left after exposing and excavating works with high contents of mineral, is transported to the transfer point in chutes arranged on exits; out-sized rock mass collected at the transfer point is preliminary crumbled with profiled cumulative charges of directional effect to fractions of 1000-100 mm and 60-100 mm, and then it is directed to the sump, wherefrom it is transported to separating at crumbling-concentration plant. Also in the sump and during transportation there are formed two flows of ore, one - from rich oxidised, crushed to fraction more 100 mm and 60-100 mm ore, while another - from non-conditional and poor ore of wastes of crumbling-concentration plant with fraction 0-10 mm and 10-25 mm; notably that before separation there is formed a common ore flow with maintaining specified quality.

EFFECT: increased extraction of mineral due to inclusion earlier lost mineral and wastes of crumbling-concentrating plant after processing of minerals into extraction.

3 dwg