Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Are new hazards being introduced in coal mines faster than existing hazards are eliminated?
Analysis shows real progress in preventing fatalities in past 25 or 30 yr only in "explosions" and accidents due to "use of explosives"; relatively little progress in reducing accidents from falls of roof and coal or surface accidents; those due to electricity have increased; discussion of factors affecting causes.
Are new hazards being introduced in coal mines faster than existing hazards are eliminated?
Analysis shows real progress in preventing fatalities in past 25 or 30 yr only in "explosions" and accidents due to "use of explosives"; relatively little progress in reducing accidents from falls of roof and coal or surface accidents; those due to electricity have increased; discussion of factors affecting causes.
Are new hazards being introduced in coal mines faster than existing hazards are eliminated?
U S Bur Mines -- Information Cir
Harrington, D. (Autor:in) / Fene, W.J. (Autor:in)
1940
11 pages
Report
Englisch
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