COMBINED WORKING OF STEEP MINERALS DEPOSITS NEARBY WATER STRUCTURES

摘要

FIELD: mining.SUBSTANCE: claimed process comprises erection at open pit bottom of ore pad with impervious loam-film screen, deriving of drain brines via water discharge gallery for safe working of underlying mineral reserves. Note here that protective pillar is extracted and composed of the mineral and replaced with artificial pillar of the filling material. Replacement is executed simultaneously with excavation in open pit at no danger of water inrush from the pit into underground working while said artificial pillar is stabilised and dome-shaped.EFFECT: ruled out water inrush, loss of minerals in separation pillar and decreased time break between open and underground working.2 dwg