Results 1 - 3 of 3

• Compendium of Structural Testing Data for 20-psi Coal Mine Seals
  8/1/2009 - Information Circulars
  This report presents nearly all structural data available from explosion tests of 20-psi mine ventilation seals and concrete-block ventilation stoppings that were conducted by the NIOSH during 1997-2008.
• Explosion Pressure Design Criteria for New Seals in U.S. Coal Mines
  7/1/2007 - Guides and manuals, Information Circulars
  This report provides a sound scientific and engineering justification to recommend a three-tiered explosion pressure design criterion for new seals. The recommendations contained herein apply to new seal design and construction in U.S. coal mines.
• Evaluating Ventilation Parameters of Three Coal Mine Gobs
  1/1/1986 - Information Circulars
  The Bureau of Mines used sulfur hexafluoride (sf6) tracer gas to evaluate the effectiveness of gob ventilation and/or sealing practices at three coal mines, each having different problems associated with their mined-out areas.