A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Falls of roof in bituminous coal mines; influence of the seasons and rate of production
Moisture and temperature changes in mines; relation of frequency of accidents to seasons; temperature fluctuations in mines; ratio of production to fatalities; review of accident frequency and fatalities from roof falls, by States, with graphs also showing coal production.
Falls of roof in bituminous coal mines; influence of the seasons and rate of production
Moisture and temperature changes in mines; relation of frequency of accidents to seasons; temperature fluctuations in mines; ratio of production to fatalities; review of accident frequency and fatalities from roof falls, by States, with graphs also showing coal production.
Falls of roof in bituminous coal mines; influence of the seasons and rate of production
U. S. Bur. Mines -- Tech. Paper
Paul, J.W. (author)
1928
40 pages
25 Figs.
Report
English
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