Effects of ancient stream channel deposits on mine roof stability
Subtitle: a case study
By: by David K. Ingram and Frank E. Chase.
Contributors: Chase, Frank E.
Series: Report of investigations (United States. Bureau of Mines) -- 9092.
Publisher: U.S. Bureau of Mines
Published: 1987
Place of publication: Washington, DC
Language: eng
Number of pages: 33
Subjects: Mine roof control.; River channels.; River channels -- Pennsylvania -- Pittsburgh Region
Notes: Two plates on folded leaves in pocket.

 86600403 // t_oclc

Bibliogr.

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