Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental Longwall mining in Pennsylvania anthracite mine -- 1
In effort to establish highly productive mechanized mining system for anthracite beds pitching between 10 and 20°, for which conventional mobile equipment is not adaptable, Bureau carried out experiment in longwall mining using Anderton-type drum cutter loader and friction-type yielding steel roof supports; roof-support system proved to be inadequate for breaking overhanging roof at break line supports, with result that roof broke over solid coal.
Experimental Longwall mining in Pennsylvania anthracite mine -- 1
In effort to establish highly productive mechanized mining system for anthracite beds pitching between 10 and 20°, for which conventional mobile equipment is not adaptable, Bureau carried out experiment in longwall mining using Anderton-type drum cutter loader and friction-type yielding steel roof supports; roof-support system proved to be inadequate for breaking overhanging roof at break line supports, with result that roof broke over solid coal.
Experimental Longwall mining in Pennsylvania anthracite mine -- 1
U S Bur Mines -- Report Investigations
Brennan, R.J. (Autor:in) / Buch, J.W. (Autor:in) / Navrocky, E.R. (Autor:in)
1964
27 pages
Report
Englisch
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Mine water problems of Pennsylvania anthracite region
| Engineering Index Backfile | 1957
Mine pumping plants -- Anthracite region of Pennsylvania
| Engineering Index Backfile | 1953
Mine flood prevention and control: Anthracite region of Pennsylvania
Engineering Index Backfile | 1957