OPENCAST WITH TWO CLOSELY LOCATED ORE BODIES DEVELOPMENT METHOD Russian patent published in 2010 - IPC E21C41/26 

FIELD: oil-and-gas industry.

SUBSTANCE: method can be used for minerals mining operations at vertical incidence limited with two ore bodies. Execute both ore bodies simultaneous production, one - by ore body contact with host rocks, other one - leaving ore pillars by the cast sides. After the second cast development till an intermediate bottom, go through inclined core entering turning platform and execute transport connection to the transfer platform during pillar development period. Step by step create from the turning platform a new steeply inclined transport exit with a longitudinal slope 20%-25% along the open cast edges, closing an old one, throw opened rock into intermediate bottom and transport, in into to the cast inside stock, already developed until designed depth, after the second cast completion till its designed depth move part of a capping there, creating a pad for the both casts.

EFFECT: mineral development efficiency and outcome increase due to decrease of capping volume, its transportation arm during the following cast deeping and its bottom formation then transferring to underground mining.

5 cl, 1 ex, 1 tbl, 3 dwg