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Mining Publication: Rapid Sampling of Products During Coal Mine Explosions
Keywords: Flammability Respirable dust level Sampling Total dust level
Original creation date: February 1991
Authors: RS Conti, IA Zlochower, MJ Sapko
Peer Reviewed Journal Article - February 1991
Download PDF Document (1.46 MB)
NIOSHTIC2 Number: 20032361
Combust Sci Tech 1991 75(4-6); :195-209
This paper describes a U.S. Bureau of Mines investigation of large-scale coal dust explosions in an experimental mine using a high speed electropneumatic mechanism for the rapid grab-sampling of gases and dusts. This technique enables the monitoring of pyrolysis and charring in fuel dust particles, and the collection of gaseous combustion products, in both large and small-scale explosions. Data obtained from full-scale dust explosion tests at the Bureau of Mines Lake Lynn Test facility show the following: Rapid sampling appears to "freeze" the burned gas compositions at the flame temperature values. Gas samples taken entirely in the flame zone consist of pyrolysis and combustion products with very low residual oxygen. The particles collected in the flame zone show signs of extensive pyrolysis and charring. Measurements of gas concentrations and particle flame temperatures suggest that char burning may have occurred in the flame zone.
Image of publication Rapid Sampling of Products During Coal Mine ExplosionsPeer Reviewed Journal Article - February 1991
Download PDF Document (1.46 MB)
NIOSHTIC2 Number: 20032361
Combust Sci Tech 1991 75(4-6); :195-209
See Also
Airborne Dust Liberation During Coal Crushing
Benchmarking Longwall Dust Control Technology and Practices
Determining the Spatial Variability of Personal Sampler Inlet Locations
Dust Considerations When Using Belt Entry Air to Ventilate Work Areas
Inaccuracy of Area Sampling for Measuring the Dust Exposure of Mining Machine Operators in Coal Mines
The Limiting Oxygen Concentration and Flammability Limits of Gases and Gas Mixtures
Performance of a Light Scattering Dust Monitor at Various Air Velocities: Results of Sampling in the Active Versus the Passive Mode
Rock Dusting Considerations in Underground Coal Mines
Status of a Tapered Element, Oscillation Microbalance-Based Continuous Respirable Coal Mine Dust Monitor
Testing a Revised Inlet for the Personal Dust Monitor
Page last reviewed: June 8, 2016
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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