METHOD FOR PLACER DREDGING Russian patent published in 1994 - IPC

FIELD: mining. SUBSTANCE: method includes opening and arrangement of peats, working of deposit untouched sections by adjacent successive runs with dredging machinery to extract rocks in face and formation of heaps of depleted sands in the wake of dragline, and repeated dredging of placer. Repeated dredging of placer is carried out on placer part near float up to filling up the residual reserves with dredging wastes. After primary working of placer untouched sections, dredger is backed from the face to dredging wastes by idling. Then, the residual reserves on the part near float are dredged by repeated run. EFFECT: higher efficiency. 5 dwg