Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Underground mill excavation at big Missouri mine
Mine on Upper Salmon river; snowfall 60 ft from Oct to Apr; underground rock conditions; mill layout; pilot tunnel 777 ft long, used later as tailing outlet; roof arch design modified to suit nature of rock; largest chambers 178 ft long, 37.5 wide and max height 40 ft, and 140 ft long, 64 ft wide and max height 55 ft. (See also - Bul n 315 July 1938)
Underground mill excavation at big Missouri mine
Mine on Upper Salmon river; snowfall 60 ft from Oct to Apr; underground rock conditions; mill layout; pilot tunnel 777 ft long, used later as tailing outlet; roof arch design modified to suit nature of rock; largest chambers 178 ft long, 37.5 wide and max height 40 ft, and 140 ft long, 64 ft wide and max height 55 ft. (See also - Bul n 315 July 1938)
Underground mill excavation at big Missouri mine
Can Inst Min Met -- Trans
Campbell, D.S. (Autor:in)
Canadian Institute of Mining and Metallurgy -- Meeting ; 1938
1938
11 pages
Aufsatz (Konferenz)
Englisch
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Underground mill excavation at big Missouri mine
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