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Geologic factors in coal mine roof stability :a progress report

Coal mine roof instability :categories and causes

Published Year

• 1980-1989 (2)

Subject

• Coal mines and mining--Safety measures (2)
• Coal--Geology (2)
• Mine roof control (2) *

Author

• Moebs, Noel N. (2)
• Stateham, Raymond M. (2) *

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