Comparison of Low Temperature Ashing (LTA) and CDEM Explosibility Determinations

Details

• Personal Author:
  Brown C ; Harris, Marcia L. ; Perera IE ; Rayyan N
• Description:
  Current guidelines from the Mine Safety and Health Administration (MSHA) state that coal mines must maintain 80% total incombustible content (TIC) in all passageways. The current method to determine the TIC is through low temperature ashing (LTA) analysis. This method includes all collected mine dust particles which pass through a 20-mesh sieve (up to 841 um in size). This measurement, however, does not necessarily correlate with explosibility since large rock dust particles count towards the TIC determination but are less effective in preventing an explosion. Similarly, large coal dust particles (larger than 75 um) will count against the TIC but also will have limited participation in an explosion. In this study, field samples of coal dust/rock dust mixtures were collected from various mines and analyzed for particle size, and potential explosibility using both the coal dust explosibility meter (CDEM) and LTA methods. The samples were then sieved through a 200-mesh sieve to remove particles greater than 75 um in size and reanalyzed using the CDEM and LTA methods. The LTA measurements showed a dramatic shift in TIC after sieving, whereas the CDEM measurements were less influenced. [Description provided by NIOSH]
• Subjects:
  Asbestos Autopsy Dust Environmental Monitoring Inorganic Chemicals Lung Lung Diseases Mining Neoplasms Occupational Health Particulate Matter Pathology Respiratory System Respiratory Tract Diseases Safety Silicon Compounds Silicon Dioxide Talc

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• Keywords:
  Author Keywords: Explosibility Coal Coal Dust Coal Mines Dust Explosions Dust Particles Dusts Explosions Low Temperature Ashing Mineral Dusts Mine Safety And Health Administration MSHA Particle Size Prevention Rock Dust Rock Mechanics Underground Mines

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• Series:
  Mining Publications
• Publisher:
  The Combustion Institute
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Missouri ; OSHA Region 3 ; OSHA Region 7 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20054653
• Citation:
  12th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions, August 12-17, 2018, Kansas City, Missouri. Pittsburgh, PA: The Combustion Institute, 2018 Aug; :9268
• Contact Point Address:
  Naseem Rayyan, National Institute for Occupational Safety and Health (NIOSH) Pittsburgh Research Mining Division (PMRD), Pittsburgh, USA
• Email:
  NRayyan@cdc.gov
• Federal Fiscal Year:
  2018
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  12th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions, August 12-17, 2018, Kansas City, Missouri
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7c729a556f02fac2619a75bf43d7cb73e294b60a58de587ad26474cb770dc4373c0e146c46c12c90851947e3e665163ba465157769f809f7f02cf0c513bddde2
• Download URL:
  https://stacks.cdc.gov/view/cdc/227831/cdc_227831_DS1.pdf
• File Type:
  [PDF - 1.93 MB ]