DEVELOPMENT OF CONTINUOUS MINING WITH LARGE-DIAMETER DEEP-HOLE CAVING AND VIBRATION DRAWING

The continuous minlng with large-diameter deep-hole caving and vibration drawing devel-oped by Fenghuangshan Copper Mine has advanteges of high-intensive mining, powerfull drawing, lowcost, safe operation and so on. Owing to that there is a horizontal-bottom undercut structure without sec-ondary blasting level in trial stope, the ore loss and dilution ratios rose greatly and drawing effeciency in-creased; Adoptting the blasting system with deck charge in blasthole and same-section hole-by-hole mil-lisecond side-direction extrusion caving, the optinlal caving effectiveness was achieved.