Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mining through 48-In. circular shafts
Two small diameter shafts were completed in Wyoming's Gas Hills uranium district by rotary boring methods to gain quick access to ore bodies; first shaft was drilled 377 ft at 60-in. diam and lined with 48-in. casing in 30 days; similar second shaft, 435 ft deep, was later put down and lined over period of three weeks.
Mining through 48-In. circular shafts
Two small diameter shafts were completed in Wyoming's Gas Hills uranium district by rotary boring methods to gain quick access to ore bodies; first shaft was drilled 377 ft at 60-in. diam and lined with 48-in. casing in 30 days; similar second shaft, 435 ft deep, was later put down and lined over period of three weeks.
Mining through 48-In. circular shafts
Min Congress J
Taylor, I.R. (Autor:in) / Tavelli, J.A. (Autor:in)
1965
5 pages
Aufsatz (Zeitschrift)
Englisch
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