Results 41 - 50 of 109

• CFD modelling of sampling locations for early detection of spontaneous combustion in long-wall gob areas
  1/1/2012 - Peer reviewed journal articles
  In this study, computational fluid dynamics (CFD) modeling was conducted to optimize gas sampling locations for the early detection of spontaneous heating in longwall gob areas.
• Workplace Aerosol Measurement
  1/1/2011 - Book chapters
  While approaches to workplace aerosol measurement differ; this book chapter emphasizes the basic sampling philosophies and methods used routinely in the workplace and the application of direct-reading monitors.
• Gas and Fume Generation at the Blast Site
  1/1/2011 - Book chapters
  Gases and fumes are generated as a result of explosives detonation at a blast site. This chapter discusses only those gases produced by the detonation of commercial explosives.
• 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).
• The Effects of Passive Diesel Particulate Filters on Diesel Particulate Matter Concentrations in Two Underground Metal/Nonmetal Mines
  6/1/2010 - Conference papers
  In this study, NIOSH measured the atmospheric concentrations of DPM and gases in two mines in order to evaluate the effects of various control strategies on the atmospheric DPM concentrations.
• Prediction of Porosity and Permeability of Caved Zone in Longwall Gobs
  3/1/2010 - Peer reviewed journal articles
  This work presents a fractal porous medium model to predict gob porosity and permeability for controlling methane flow and to predict air leakage into the gob.
• Reconciling Longwall Gob Gas Reservoirs and Venthole Production Performances Using Multiple Rate Drawdown Well Test Analysis
  12/1/2009 - Peer reviewed journal articles
  In this paper, the production rate-pressure behaviors of six gob gas ventholes drilled over three adjacent panels were analyzed by using conventional multi-rate drawdown analysis techniques.
• The Limiting Oxygen Concentration and Flammability Limits of Gases and Gas Mixtures
  6/1/2009 - Peer reviewed journal articles
  This paper presents data on the limiting (minimum) oxygen concentration in the presence of added N₂, methane, propane, ethylene, carbon monoxide, and hydrogen and some of their binary mixtures, and addresses flammable concentration limits.
• Gas Sorption and Transport in Coals: A Poroelastic Medium Approach
  1/1/2009 - Peer reviewed journal articles
  In this paper, single-component gas sorption and transient diffusion processes are described within coal matrix exhibiting bimodal pore structure.