Results 21 - 25 of 25

• Reverse Performance Characteristics of Main Mine Fans
  8/1/1983 - Open File Reports
  Laboratory and field tests of vane axial main mine fans in the 7- to 9-ft diameter size range were conducted to establish forward and reverse performance characteristics under controlled conditions and at typical mine installations.
• Degasification of Virgin Pittsburgh Coalbed through a Large Borehole
  1/1/1973 - Reports of Investigations
  The Bureau of Mines is in the process of degasifying a virgin area in northern West Virginia from the base of an 839-foot-deep vertical borehole.
• 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...
• 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.
• Blast Wave Propagation in Underground Mines
  2/1/1995 - Conference papers
  This project investigates the behavior of blast waves from the detonation of high explosives in an underground mine.