A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rock dusting by hand method
Suggests systematic application of rock dust by coal-face workers; opinion is expressed that hardy small fraction of one per cent of coal mines of United States are adequately protected by rock dust; until adopted as necessary practice, it is certain to fail as preventive of widespread disasters. (see also abstract in Iron and Coal Trades Rev., vol. 118, no. 3180, Feb. 8, 1929, p. 209)
Rock dusting by hand method
Suggests systematic application of rock dust by coal-face workers; opinion is expressed that hardy small fraction of one per cent of coal mines of United States are adequately protected by rock dust; until adopted as necessary practice, it is certain to fail as preventive of widespread disasters. (see also abstract in Iron and Coal Trades Rev., vol. 118, no. 3180, Feb. 8, 1929, p. 209)
Rock dusting by hand method
U. S. Bur Mines -- Information Circular
Harrington, D. (author) / Owings, C.W. (author)
1928
7 pages
Report
English
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Engineering Index Backfile | 1924
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| Engineering Index Backfile | 1927
| Engineering Index Backfile | 1926
Rock dusting and sampling including wet rock dusting, at bureau of mines experimental coal mine
| Engineering Index Backfile | 1956