Rapid Sampling of Products During Coal Mine Explosions

Details

• Personal Author:
  Conti, Ronald S. ; Sapko, Michael J. ; Zlochower, Isaac A.
• Description:
  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. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Dust Explosions Mining Occupational Health Safety
• Keywords:
  Coal-mining Combustion-products Dust-explosions Mine-disasters Mine-fires Mining-industry Sampling-equipment Sampling-methods
• Series:
  Mining Publications
• ISSN:
  0010-2202
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  195-209
• Volume:
  75
• Issue:
  4
• NIOSHTIC Number:
  nn:20032361
• Citation:
  Combust Sci and Technol 1991 Feb; 75(4-6):195-209
• Contact Point Address:
  Pittsburgh Research Center, Bureau of Mines, U.S. Department of the Interior, Pittsburgh, PA, 15236
• Federal Fiscal Year:
  1991
• Peer Reviewed:
  True
• Source Full Name:
  Combustion Science and Technology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:13b27c984c40529b384c62155c4727d35ad02e3e4bae9bc50500a9006e8a6634cde89c263283c807f0745e89791da8327a0cf749ebeecb4000a867940806da5c
• Download URL:
  https://stacks.cdc.gov/view/cdc/226775/cdc_226775_DS1.pdf
• File Type:
  [PDF - 1.01 MB ]