Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Roof control, Beech Bottom Mine, Windsor Power House Coal Company
Notes on practice in Panhandle field, about 10 mi north of Wheeling, W Va; mine is operating in Pittsburgh n 8 seam and is equipped to produce coal from tract of 10,000 acres at rate of 1,000,000 tons per year; double entry system, with 32 rooms in each panel; main entry timbering; butt entry timbering; room neck and room timbering.
Roof control, Beech Bottom Mine, Windsor Power House Coal Company
Notes on practice in Panhandle field, about 10 mi north of Wheeling, W Va; mine is operating in Pittsburgh n 8 seam and is equipped to produce coal from tract of 10,000 acres at rate of 1,000,000 tons per year; double entry system, with 32 rooms in each panel; main entry timbering; butt entry timbering; room neck and room timbering.
Roof control, Beech Bottom Mine, Windsor Power House Coal Company
W Va Coal Min Inst -- Proc
Wade, E.S. (Autor:in)
West Virginia Coal Mining Institute -- 26th Annual Meeting ; 1934
1934
14 pages
Aufsatz (Konferenz)
Englisch
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