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.
Blast, breccia, Murray Mine, norite, ore, stope, Drifts, Mine, Mines, Ore, Ores, pillar, Pillars