Modern Mining Methods at Copper Mountain; Radial Blast Hole Mathematics

THE mine at Copper Mountain of the Granby Consolidated Mining, Smelting and Power Company was one of the pioneers in the use of blast-hole diamond drilling for ore breakage. This method of ~mining has now been brought to a high degree of perfect10n. The system rin use has• been described in a previously published paper(l) which has become an important part of the literature o the blast-hole drilling method.
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