A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Roof bolting
Development in roof bolting during 1951 shows trend toward additional refinements in techniques and testing; installed at 508 coal mines and 52 non-coal mines in 20 states; review and study of progress.
Roof bolting
Development in roof bolting during 1951 shows trend toward additional refinements in techniques and testing; installed at 508 coal mines and 52 non-coal mines in 20 states; review and study of progress.
Roof bolting
Min Congress J
Broughton, H.J. (author) / Johnson, L.H. (author)
1952
4 pages
Article (Journal)
English
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| Engineering Index Backfile | 1953
| Engineering Index Backfile | 1951
| Engineering Index Backfile | 1957
| Engineering Index Backfile | 1950
Roof-bolting Delaware aqueduct
| Engineering Index Backfile | 1953