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Sunday, May 17, 2020 | History

2 edition of Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania found in the catalog.

Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania

Noel N. Moebs

Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania

by Noel N. Moebs

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  • 12 Currently reading

Published by Dept. of the Interior, Bureau of Mines in [Washington] .
Written in English

    Subjects:
  • Coal -- Geology -- Pennsylvania -- Pittsburgh.,
  • Mine timbering.,
  • Mine roof bolting.

  • Edition Notes

    Includes bibliographical references and appendix.

    Statementby Noel N. Moebs.
    SeriesReport of investigations - Bureau of Mines ; 8230, Report of investigations (United States. Bureau of Mines) -- 8230.
    ContributionsUnited States. Bureau of Mines.
    The Physical Object
    Pagination[2], ii, 30 p. :
    Number of Pages30
    ID Numbers
    Open LibraryOL15214749M


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Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania by Noel N. Moebs Download PDF EPUB FB2