Results 71 to 80 of about 2,636,818 (211)
Methane migration characteristics of the Pocahontas No. 3 coalbed [PDF]
"Methane-flow and pressure data taken from a mine in the Pocahontas No. 3 Coalbed are compared with flow rates from lump coal obtained in laboratory experiments.
core
Methane emission from U.S. coal mines : a survey [PDF]
This survey was conducted to determine the magnitude of the methane emission and control problem in U.S. bituminous coal mines. The resultant data indicate that the emission rate for any given coalbed depends primarily on the coal production rate and on ...
core +2 more sources
The composition of coalbed gas [PDF]
"Samples of gas were obtained directly from the coalbed during drilling of horizontal and vertical boreholes in six different formations. The samples were analyzed by gas chromatography for C1 to C5 hydrocarbons and for 02, N2, H2, He, and CO2.
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Application of Integrated Directional and Guide Drilling Technology in Deep Coalbed Methane
Journal of Physics: Conference SeriesAbstract Deep coalbed methane is characterized by deep burial, complex and diverse microstructures, significant lateral variations in reservoirs, and the development of internal interlayers. Current seismic exploration methods suffer from severe high-frequency signal attenuation in coal layers, resulting in low seismic resolution, which ...
Weixing Zhu +7 more
openaire +1 more source
Legal Considerations in the Development of Coalbed Methane [PDF]
, 2001 This article is premised on the fact that the development of coalbed methane has only recently become commercially viable. The author defines coalbed methane and then considers various legal definition issues pertaining to its development.
Laffin, Michael J.
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Meitan kexue jishuMedium-rank coalbed methane is the core target for deep coalbed methane exploration and development in China. Conducting research on the influence laws and control mechanisms of fracturing geological characteristics of coal reservoirs at this metamorphic
Lichao CHEN +7 more
doaj +1 more source
Methane control on longwalls with cross-measure boreholes (Lower Kittanning Coalbed) [PDF]
"The cross-measure borehole technique has been shown by the Bureau of Mines to be an effective method of controlling methane liberated by fracturing the roof strata in longwall gobs where overburden is less than 750 ft (229 m). Boreholes are drilled into
core
Methane emission rate studies in a northern West Virginia mine [PDF]
"Methane emission rates were studied in a Pittsburgh coalbed mine in northern West Virginia. A fullface boring-type continuous miner, equipped with a methane monitor, was used in the development of a set of eight main headings, one side of which was near
core
Meitan kexue jishuThe pore-fracture structure of deep coal reservoir is of great significance to the evaluation and exploration of deep coalbed methane resource potential.
Ze DENG +5 more
doaj +1 more source