A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shaft raising in Alabama
Ventilation shaft 18 ft in diam and 230 ft deep was raised at coal mine near Birmingham, Ala; pregrouting to insure dry shaft was done by diamond core drilling and step grouting; center diamond drill hole was drilled from surface into entry below; 43 nine inch holes were drilled on three circle pattern; shooting and mucking were finished in 21 days on single shift basis; costs and safety record on project were good.
Shaft raising in Alabama
Ventilation shaft 18 ft in diam and 230 ft deep was raised at coal mine near Birmingham, Ala; pregrouting to insure dry shaft was done by diamond core drilling and step grouting; center diamond drill hole was drilled from surface into entry below; 43 nine inch holes were drilled on three circle pattern; shooting and mucking were finished in 21 days on single shift basis; costs and safety record on project were good.
Shaft raising in Alabama
Min Congress J
Smith, E.P. (author) / Foust, D.T. (author)
1964
6 pages
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
| Engineering Index Backfile | 1907
Shaft raising in Scottish highlands
| Engineering Index Backfile | 1957
Elsevier | 1984
Raising with suspended work cage at Irene shaft, Leadville, Colo
| Engineering Index Backfile | 1958
Methods of raising a shaft on timber in hard rock
| Engineering Index Backfile | 1912