Pillar Blasting at the Murray Mine
H. W. SMITH; A.R.H. BURFORD
In April, 1961, a large pillar was removed by blasthole mining methods at Inco's Murray mine. More than half a million pounds of explosives were used to break 2,120,000 tons of ore in a s ingle underground blast. T he 5,810 2-inch boreholes, involving 435,815 feet of drilling, were loaded over a three-week period, using conventional explosives and short-period electric caps. From this blast, more than half a million tons of ore have been removed to date (April, 1962) through slusher trenches situated in the footwall of the orebody.
Mots Clés:
Blast, breccia, Murray Mine, norite, ore, stope, Drifts, Mine, Mines, Ore, Ores, pillar, Pillars
