Results 101 - 110 of 259

• Artificial Neural Networks to Determine Ventilation Emissions and Optimum Degasification Strategies for Longwall Mines
  6/1/2008 - Conference papers
  This study proposes a principle component analysis (PCA) and artificial neural network (ANN) approach to predict the ventilation methane emission rates of U.S. longwall mines and the optimum combination of degasification boreholes based on the given cha...
• Explosion Hazards From Methane Emissions Related to Geologic Features in Coal Mines
  4/1/2008 - Information Circulars
  This report presents a historical framework detailing the impact of geologic features on excess gas emissions and resultant mine explosions.
• Technology News 530 - Frictional Ignition of Methane-Air in the Presence of Liquid Hydrocarbons
  3/1/2008 - Technology News
  This briefly describes testing done to ignite methane-air in the presence of liquid hydrocarbons, and gives recommendations for limiting frictional ignition.
• Reservoir Modeling-Based Prediction and Optimization of Ventilation Requirements During Development Mining in Underground Coal Mines
  2/1/2008 - Conference papers
  This NIOSH study presents an approach for prediction of methane inflow rates using coalbed methane reservoir modeling which can be used to limit the methane concentrations occurring as a result of the influences of various coalbed and operational parame...
• Swelling-Induced Volumetric Strains Internal to a Stressed Coal Associated with CO2 Sorption
  11/1/2007 - Peer reviewed journal articles
  A discussion the spatio-temporal volumetric strains in a consolidated Pittsburgh seam coal sample which were evaluated while both confining pressure and carbon dioxide CO2 pore pressure were evaluated.
• Portable XRF Analysis of Occupational Air Filter Samples from Different Workplaces Using Different Samplers: Final Results, Summary and Conclusions
  11/1/2007 - Peer reviewed journal articles
  This paper concludes a five-year program on research into the use of a portable X-ray fluorescence (XRF) analyzer for analyzing lead in air sampling filters from different industrial environments, including mining, manufacturing and recycling.
• Role of Lubrication Oil in Particulate Emissions from a Hydrogen-Powered Internal Combustion Engine
  10/1/2007 - Peer reviewed journal articles
  The primary goal of this study was to investigate the formation of combustion-generated particles derived from lubrication oil in the absence of fuel-produced soot.
• Examination of Diesel Aftertreatment Systems at NIOSH Lake Lynn Laboratory
  10/1/2007 - Conference papers
  A paper describing tests conducted in the NIOSH Diesel Laboratory at the Lake Lynn Laboratory experimental mine, a facility developed to allow evaluation of control technologies directly in an underground environment.
• Explosion Prevention in United States Coal Mines
  9/1/2007 - Conference papers
  This paper discusses methods for protecting U.S. underground coal mines from explosions of methane gas and coal dust, and presents new research, such as the Coal Dust Explosibility Meter, a handheld device to directly measure coal dust explosibility.
• Numerical Analysis of the Influence of In-Seam Horizontal Methane Drainage Boreholes on Longwall Face Emission Rates
  9/1/2007 - Peer reviewed journal articles
  This study investigates different horizontal methane drainage borehole patterns, borehole lengths, and degasification times prior to and during panel extraction to evaluate their effectiveness in reducing methane emissions using a dynamic 3D reservoir m...