METHOD FOR MINING STEEP ORE DEPOSITS BY INDUCED LEVEL CAVING WITH LONGWALL STOPING Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: according to method, driven are drilling, discharge, and delivery workings. Ore is broken in panels for caving of rock. Discharge is effected by movable vibration feeders located in parallel discharge workings driven perpendicularly to work face. Movable vibration feeders are installed in central part of panel in each discharge working, and release funnels are created above vibration feeders. Driven below discharge workings at panel boundary is delivery working, and ore is released into aforesaid working. Ore release is carried out by simultaneous engagement of all vibration feeders of panel in process of filling receptacles in delivery working. Loading and delivery of ore in delivery working are performed at disengaged vibration feeders. Panel in horizontal plane can be made curvilinear and convex towards side of caved rock. Diameter of curvature between adjacent release openings is equal to 0.8-1.1 of ore body thickness. Aforesaid procedure cuts loss and impoverishes ore. EFFECT: higher efficiency. 3 cl, 6 dwg