A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Raising with suspended work cage at Irene shaft, Leadville, Colo
Method used involved driving raw, 6-ft diam ventilation rise and emergency escapeway, using work cage that was suspended on hoisting rope extended down small diameter drill hole; preparation and raising period; costs and safety.
Raising with suspended work cage at Irene shaft, Leadville, Colo
Method used involved driving raw, 6-ft diam ventilation rise and emergency escapeway, using work cage that was suspended on hoisting rope extended down small diameter drill hole; preparation and raising period; costs and safety.
Raising with suspended work cage at Irene shaft, Leadville, Colo
U S Bur Mines -- Information Cir
Bolmer, R.L. (author) / Greenlee, B.B. (author)
1958
27 pages
Article (Journal)
English
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