METHOD FOR OPENING STEEP THIN ORE DEPOSITS Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: this reduces volume of hauling operations in filling worked-out space and developing deposits without establishing pillars. According to method, workings are driven from day surface to ore body, spiral working is driven, ore in work face is loosened by blasting, ore is removed by stopes along strikes, ore is gathered, transported and worked-out space is gobbed. Spiral working is driven in rock and ore sections. Loosening of ore is effected from inter-spiral layer when work face reaches spiral working in second and subsequent ore sections. Worked-out space is gobbed with rock from driving of spiral working. Created at top and bottom of working section in inter-spiral layer are coverings. Arranged under cantilever side of ore body of next stope is flexible movable screen. Upper covering is built before start of gathering loosened ore in stopes. Lower covering and flexible screen are arranged prior to filling worked-out space after stopes. EFFECT: high efficiency. 4 dwg