Results 71 - 80 of 226

• Factors Affecting Coal Particle Ignition Under Oxyfuel Combustion Atmospheres
  1/1/2011 - Peer reviewed journal articles
  Thirteen coals of different rank were tested for ignition propensity in a 20-L explosion chamber simulating oxyfuel combustion gas conditions. The effects of coal type, coal concentration, O2 in CO2 atmospheres, and particle size were investigated.
• Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
  11/1/2010 - Peer reviewed journal articles
  This paper describes a practical approach for implementing stochastic determination of gob gas ventholes production performances and for generalizing the prediction capability of deterministic models.
• MCP - Methane Control and Prediction
  9/1/2010 - PC software
  A software program that addresses some of the methane and methane control issues in longwall coal mines in the U.S. and other countries.
• Characterizing Exposures to Airborne Metals and Nanoparticle Emissions in a Refinery
  7/1/2010 - Peer reviewed journal articles
  An air quality survey was conducted at a precious metals refinery in order to evaluate worker exposures to airborne metals and to provide detailed characterization of the aerosols.
• A Handheld Electrostatic Precipitator for Sampling Airborne Particles and Nanoparticles
  6/1/2010 - Peer reviewed journal articles
  Researchers at NIOSH are developing methods for characterizing ultrafine aerosols in workplaces. One method includes the detailed analysis of collected particles using electron microscopy (EM).
• A New Method to Calculate Permeability of Gob for Air Leakage Calculations and for Improvements in Methane Control
  6/1/2010 - Conference papers
  This study demonstrates a fractal approach to calculating permeability of gob for air leakage that allows the calculation of porosity and permeability from the size distribution of broken rock material in the gob, which can be determined from image anal...
• Historical Development of Technologies for Controlling Methane in Underground Coal Mines
  1/1/2010 - Conference papers
  This paper discusses several milestone events that show the progress of methane control research in underground coal mines.
• Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
  11/1/2009 - Conference papers
  This paper demonstrates the applications of coal bed reservoir engineering and modeling techniques for optimizing and controlling methane emissions in longwall and continuous miner sections.
• Frictional Ignitions in Underground Bituminous Coal Operations 1983-2005
  8/1/2009 - Peer reviewed journal articles
  NIOSH conducted a statistical study of available data regarding frictional ignitions in the United States from 1983 to 2005 to determine and define conditions controlling their occurrence.
• Modeling Methane Emissions and Ventilation Needs by Examination of Mining Induced Permeability Changes and Related Damage to Ventilation Controls
  6/1/2009 - Conference papers
  This paper aims to examine the effects of porosity and permeability changes of the coal seam on methane emissions in an underground continuous miner section.