A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Yieldable steel arch sets, 102 of them placed in 452-ft wide Deadman shear zone, made it possible to successfully drive Silver Mountain cross cut at Mullen, Idaho through exceptionally heavy ground; neither timber sets or roof bolts and headboards would hold shear; problem of distortion of steel rings.
Yieldable steel arch sets, 102 of them placed in 452-ft wide Deadman shear zone, made it possible to successfully drive Silver Mountain cross cut at Mullen, Idaho through exceptionally heavy ground; neither timber sets or roof bolts and headboards would hold shear; problem of distortion of steel rings.
How hecla used yieldable steel sets
Min World
Crandall, W.E. (author)
Mining World ; 21
1959
5 pages
Article (Journal)
English
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