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Coalbed methane in Wyoming (second revision)
, 2004 Coalbed methane in Wyoming (second ...
R.M. Lyman (10071331) +3 more
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Meitan xuebaoThe blocking of inorganic minerals in coalbed methane development will cause the low production of coalbed methane well, which will seriously restrict the continuous and stable production of coalbed methane well. Acid dissolution is an effective means to
Xitu ZHANG +6 more
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Economic evaluation of directional drilling for methane drainage from coalbeds [PDF]
"The Bureau of Mines estimated the economic feasibility of investing in a directional hole methane drainage project in the Pittsburgh coalbed for 5 yr in advance of mining. This report estimates the capital investment and operating cost of recovering 325
core
Methane and Dust Controls for Longwalls: Pocahontas No. 3 Coalbed, Grundy, Va. [PDF]
The periphery of longwall panels in the Pocahontas No. 3 Coalbed is characterized by a zone of reduced permeability that inhibits the natural drainage of methane. However, natural drainage holes drilled during development have been found to reduce the g..
core
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
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Energy Science & EngineeringBased on the engineering background of coalbed methane block in Liujia District of Fuxin with complex geological conditions, a seepage mathematical model considering the dynamic changes of porosity and permeability of coal reservoir caused by coal matrix
Bing Qin +6 more
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Guidelines for the prediction and control of methane emissions on longwalls [PDF]
"Although longwall mining productivity can far exceed that of room-and-pillar mining, the total methane emissions per extracted volume associated with longwall sections are generally higher than those for continuous miner or pillar removal sections ...
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Degasification of the Mary Lee Coalbed, Brookwood, Ala. [PDF]
"The Bureau of Mines has developed several techniques for draining methane from coalbeds in advance of mining. Drilling long horizontal holes from an underground location is one such technique, which was successfully demonstrated in the Pittsburgh and ...
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Methane emission from U.S. coal mines in 1975 : a survey : a supplement to Information circulars 8558 and 8659 [PDF]
This Bureau of Mines report tabulates methane emissions from U.S. bituminous coal mines with daily emission rates of at least 100,000 cfd according to States, counties, and coalbeds.
core
Dynamic settlement law of coal powder during single-phase flow stage of coalbed methane wellbore
Meikuang AnquanIn response to the severe problem of coal powder production in some coalbed methane wells during the development process of coalbed methane, a set of coal powder dynamic settlement experimental platform as been developed; based on the on-site production ...
Hao HU +7 more
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