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Degasification study from an air shaft in the Beckley Coalbed
Comparisons between cross-measure boreholes and surface gob holes
Horizontal trajectories of rotary-drilled holes
Rotary drilling techniques used in the Beckley coalbed
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Published Year
1980-1989 (4) *
Subject
Boring (1)
Boring--Pennsylvania--Ebensburg Region (1)
Coalbed methane drainage--Pennsylvania--Ebensburg Region--Testing (1)
Coalbed methane drainage--West Virginia (1)
Coalbed methane drainage--West Virginia--Rotary drilling (1)
Longwall mining--Pennsylvania--Ebensburg Region (1)
Methane--United States (1)
Mine ventilation (1)
Author
Goodman, Tobias W. (4) *
Cervik, Joseph. (3)
Aul, George N. (1)
