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Notes on timbering deep-seated placer deposits
How to proceed with calculations and design of timbering of drifts and other underground openings; effects of nature of dirts; angle of repose; supporting beams; props; examples of calculation.
Notes on timbering deep-seated placer deposits
How to proceed with calculations and design of timbering of drifts and other underground openings; effects of nature of dirts; angle of repose; supporting beams; props; examples of calculation.
Notes on timbering deep-seated placer deposits
Can. Min. Jl
Robertson, J.H. (author)
1930
2 pages
4 figs.
Article (Journal)
English
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Timbering in deep placer mining
| Engineering Index Backfile | 1917
| Engineering Index Backfile | 1915