Substitution of 2-speed air locomotive and 3-ton automatic dump car for hand tramming methods at Copper Mountain mine of Granby Consolidated, British Columbia, resulted in labor savings of 26%; data on estimated drifting cycle; performance of air locomotive.
Granby adopts air trammers -- Cuts drifting labor costs 26%
Eng Min J
Engineering and Mining Journal ; 154 , n 8
1953
3 pages
Article (Journal)
English
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