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Effect of a surface borehole on longwall gob degasification(Pocahontas No. 3 Coalbed)

Methane emission rate study in a deep Pocahontas No. 3 coalbed mine in conjunction with drilling degasification holes in the coalbed

Bleeder system in virgin area in a Pittsburgh coalbed mine

Statistical analysis of methane concentration fluctuations produced by incomplete mixing of methane and air at a model coal mine working face

Longwall gob degasification with surface ventilation boreholes above the Lower Kittanning coalbed

Hydraulic stimulation of a surface borehole for gob degasification

Foam stimulation to enhance production from degasification wells in the Pittsburgh coalbed

Directional drilling for coalbed degasification :program goals and progress in 1978

Drainage of methane from the overlying Pocahontas no. 4 coalbed from workings in the Pocahontas no. 3 coalbed


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