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Geologic factors in coal mine roof stability :a progress report
Coal mine roof instability :categories and causes
Case evaluation of a surface seismic reflection technique for delineating coalbed discontinuities
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Published Year
1980-1989 (3) *
Subject
Coal--Geology (3) *
Coal mines and mining--Safety measures (2)
Mine roof control (2)
River channels (1)
Seismic reflection method (1)
Author
Moebs, Noel N. (2)
Stateham, Raymond M. (2)
Ingram, David K. (1)
Molinda, G. M. (1)
