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Procedures used for sampling fracture orientations in an underground coal mine

A Bureau of Mines direct-reading azimuth protractor

Published Year

• 1970-1979 (2)

Subject

• Rock mechanics--Research (2) *
• Coal mines and mining--Research (1)
• Fracture mechanics--Research (1)
• Protractors (1)

Author

• Bolstad, D. D. (2) *
• Mahtab, M. A. (2)
• Alldredge, J. R. (1)

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