 |
|
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
4 results returnedEffect of a surface borehole on longwall gob degasification(Pocahontas No. 3 Coalbed)
Control of longwall gob gas with cross-measure boreholes (upper Kittanning coalbed)
Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal
Published Year
Subject
- Boring (4) *
- Mine ventilation (4) *
- Coal mines and mining (1)
- Coal mines and mining--Safety measures (1)
- Coalbed methane drainage--Pennsylvania (1)
- Firedamp (1)
- Methane (1)
- Mine gases (1)
Author
Search developed and maintained by the University of Washington Libraries
Copyright 2010