Results 31 - 40 of 40

• Geology and Gas Content of Coalbeds in Vicinity of Bureau of Mines, Bruceton, Pa.
  1/1/1977 - Reports of Investigations
  Two degasification test boreholes were drilled to depths of 1,238 and 1,212 feet on Bureau of Mines property at Bruceton, Pennsylvania, as part of the Bureau of Mines long-range coal degasification program.
• Geological Factors Affecting Methane in the Beckley Coalbed
  1/1/1976 - Reports of Investigations
  This Bureau of Mines study reviews the geological factors that affect methane in the Beckley coalbed in southern West Virginia, including overburden, coalbed structure, type and changes in lithology above and below the Beckley coalbed.
• Low-Temperature Evolution of Hydrocarbon Gases From Coal
  1/1/1974 - Reports of Investigations
  Although it is generally believed that coal formation occurred at temperatures below 200 deg c, most experimental work on gas formation from coal has been performed at temperatures between 200 deg and 1,000 deg C. The objective of this Bureau of Mines e...
• The Direct Method of Determining Methane Content of Coalbeds for Ventilation Design
  1/1/1973 - Reports of Investigations
  The applicability of the "direct method" for determining the methane content of virgin coalbeds was tested. Preliminary results indicate that the direct method, when applied to exploration cores, can be successfully used to estimate coalbed gas content ...
• The Composition of Coalbed Gas
  1/1/1973 - Reports of Investigations
  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.
• Methane Diffusion Parameters for Sized Coal Particles: A Measuring Apparatus and Some Preliminary Results
  1/1/1972 - Reports of Investigations
  A sorption apparatus for measuring the equilibrium sorption isotherm and the rate of diffusion of methane from fine-sized coal was designed and constructed. Preliminary work that used Pittsburgh and Pocahontas No. 3 Coal shows that the diffusion coeffic...
• Methane and Dust Control by Water Infusion: Pittsburgh Coalbed (Fairview, W. Va.)
  1/1/1972 - Reports of Investigations
  The effect of water infusion on the flow of methane and on the production of dust was investigated at an active face in the Pittsburgh coalbed. The average total flow of methane at the face decreased by approximately 79 percent, whereas the flow from th...
• Sorption Investigations of Methane on Coal
  3/1/1969 - Technical Progress Reports
  The Bureau of Mines has conducted desorption work on fine coal particles at near atmospheric pressure. An apparatus has been developed that uses a capacitance manometer to measure desorption of methane from coal particles up to 2 inches in diameter and ...
• Gas Migration Characteristics of Coalbeds
  3/1/1969 - Technical Progress Reports
  The Bureau of Mines conducted drilling studies in the Pocahontas No. 3, the Pittsburgh, and a western coalbed to establish the gas migration characteristics for each.
• Removing Methane (Degasification) from the Pocahontas No. 4 Coalbed in Southern West Virginia
  1/1/1963 - Reports of Investigations
  Tests were conducted in the Pocahontas No. 4 coalbed in southern West Virginia to determine if successful degasification techniques, developed during an earlier study in the Pittsburgh coalbed, would effectively remove methane from those usually more ga...