A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Recent changes in mining methods at ray mines of the Nevada consolidated copper Co.
Efficiency of men, elimination of timber repairs and improved ore extraction achieved; pyramidal undercutting system devised; uniform ore drawing essential; one hundred per cent extraction maintained; graphic illustrations and costs; discussion covering two stoping methods is reprinted in part from U. S. Bureau of Mines -- Information Cir., no. 6167, by R. W. Thomas, indexed in Engineering Index 1929, p. 517.
Recent changes in mining methods at ray mines of the Nevada consolidated copper Co.
Efficiency of men, elimination of timber repairs and improved ore extraction achieved; pyramidal undercutting system devised; uniform ore drawing essential; one hundred per cent extraction maintained; graphic illustrations and costs; discussion covering two stoping methods is reprinted in part from U. S. Bureau of Mines -- Information Cir., no. 6167, by R. W. Thomas, indexed in Engineering Index 1929, p. 517.
Recent changes in mining methods at ray mines of the Nevada consolidated copper Co.
Min. Congress Jl
Kumke, C.A. (author)
1930
8 pages
5 Figs
Article (Journal)
English
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Mining practice at Ray Mines, Nevada Consolidated Copper Co., Ray, Ariz.
| Engineering Index Backfile | 1929
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