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First phase of studies to determine design and behavior of unsupported roof in experimental room in limestone; selection of roof horizon and design of room were results of investigation of geology of formation, physical properties of samples from proposed roof, and calculations from theory of gravity loaded beams.
First phase of studies to determine design and behavior of unsupported roof in experimental room in limestone; selection of roof horizon and design of room were results of investigation of geology of formation, physical properties of samples from proposed roof, and calculations from theory of gravity loaded beams.
Roof-span studies in limestone
U S Bur Mines -- Report Investigations
Merrill, R.H. (Autor:in)
1957
38 pages
Report
Englisch
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