Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Roof bolting
If further reductions are to be made in roof fall injuries, place to begin is in "danger zone" within 25 ft of face where about 75% of accidents occur; advantages of roof bolting over conventional timbering at mine in Indiana.
Roof bolting
If further reductions are to be made in roof fall injuries, place to begin is in "danger zone" within 25 ft of face where about 75% of accidents occur; advantages of roof bolting over conventional timbering at mine in Indiana.
Roof bolting
Min Congress J
McCullough, W.J. (Autor:in) / Thomas, E. (Autor:in)
1957
4 pages
Aufsatz (Zeitschrift)
Englisch
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| Engineering Index Backfile | 1953
| Engineering Index Backfile | 1952
| Engineering Index Backfile | 1950
| Engineering Index Backfile | 1951
Roof-bolting Delaware aqueduct
| Engineering Index Backfile | 1953