A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Continuing study as indexed in Engineering Index 1939 p 749, from Report of Investigations n 3444, this report presents method of measuring velocity of sound in rock mine pillars in situ, and describes apparatus required to make such measurements; method has been applied to rock pillars in Leadwood mine of St. Joseph Lead Co, from which conclusions are drawn as to possibilities of method.
Continuing study as indexed in Engineering Index 1939 p 749, from Report of Investigations n 3444, this report presents method of measuring velocity of sound in rock mine pillars in situ, and describes apparatus required to make such measurements; method has been applied to rock pillars in Leadwood mine of St. Joseph Lead Co, from which conclusions are drawn as to possibilities of method.
Measurement of pressures on rock pillars in underground mines -- II
U S Bur Mines -- Report Investigations
Obert, L. (author)
1940
11 pages
Report
English
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Measurement of pressures on rock pillars in underground mines -- I
| Engineering Index Backfile | 1939
Measurement of rock pressures in underground mines
| Engineering Index Backfile | 1941
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