Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Discussion of room and pillar working adopted in American mines, depending on local conditions; author advances theory regarding multple entries, suggesting that series of parallel excavations made along area of limited width is responsible for good roadway conditions. Before Midland Inst Min Engrs. (See also - n 4513 July 11 1947 p 37-43; (discussion) n 4518 Aug 15 p 211-3; Iron and Coal Trades Rev v 154 n 4137 June 27 1947 p 1255-8)
Discussion of room and pillar working adopted in American mines, depending on local conditions; author advances theory regarding multple entries, suggesting that series of parallel excavations made along area of limited width is responsible for good roadway conditions. Before Midland Inst Min Engrs. (See also - n 4513 July 11 1947 p 37-43; (discussion) n 4518 Aug 15 p 211-3; Iron and Coal Trades Rev v 154 n 4137 June 27 1947 p 1255-8)
American coal mining methods
Colliery Guardian
Phillips, D.W. (Autor:in)
Colliery Guardian ; 175
1947
6 pages
Aufsatz (Zeitschrift)
Englisch
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