Improved drilling of coal measure rocks for underground mine void detection and exploration programs
By: by Pamela J. Watson, Patrick A. Tuzinski, and John E. Pahlman.
Contributors: Tuzinski, Patrick A.; Pahlman, J. E.
Series: Report of investigations (United States. Bureau of Mines) -- 9370
Publisher: Bureau of Mines, United States Dept. of the Interior
Published: 1991
Place of publication: Washington, DC
Language: eng
Number of pages: 28
Subjects: Mine surveying.; Abandoned coal mines.; Coal-cutting bits.; Polyethylene oxide
Notes:  91008575  t_oclc

Bibliogr.

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