Results 1 - 4 of 4

• Methane Migration Characteristics of the Pocahontas No. 3 Coalbed
  1/1/1972 - Reports of Investigations
  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. From this, it is concluded that the main source of gas is the intact coalbed rather than a "...
• Methane Emission Rate Study in a Deep Pocahontas No. 3 Coalbed Mine in Conjunction With Drilling Degasification Holes in the Coalbed
  1/1/1972 - Reports of Investigations
  A degasification experiment was conducted in a Pocahontas No. 3 Coalbed mine in Virginia. It involved (1) drilling holes in the coalbed in the outside headings of a set of five being developed in virgin area and (2) conducting a methane emission rate st...
• Methane Emission in Coal Mines: Effects of Oil and Gas Wells
  1/1/1972 - Reports of Investigations
  The method of moving averages was found useful in assessing the nature of methane emission in coal mines. Emission rates were influenced markedly by the presence of abandoned oil and gas wells in the vicinity of the mine. Such wells appeared to increase...
• Methane Emission Rate Studies in a Central Pennsylvania Mine
  1/1/1971 - Reports of Investigations
  The purpose of this study was to determine the characteristics of methane emissions during coal extraction by a longwall mining system. The study was conducted over 22 consecutive shifts. The average methane emission rate from the Lower Kittanning coalb...