Report of Investigations 8708: Inhibiton and Extinction of Coal Dust and Methane Explosions

Details

• Personal Author:
  Cashdollar, Kenneth L. ; Hertzberg, Martin ; Lazzara, Charles P. ; Smith, Alex C.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  The Bureau of Mines 8-liter flammability system was used to study the effectiveness of a variety of powdered inhibitors in preventing the propagation of explosions of coal dust or methane in air. Over 35 different chemical additives were evaluated against Pittsburgh seam pulverized coal. The least effective inhibitors were the carbonates, which required mass additions in the range of two to three parts inhibitor to one part of coal dust in order to prevent propagation. The most effective inhibitors were the derivatives of ammonium phosphate, which were effective quenching agents at additions of only one part inhibitor to four parts of coal dust. Alkali halide powders were of intermediate effectiveness. These laboratory-scale results are in good agreement with full-scale mine experiments in all cases where detailed comparisons have been made. Data were also obtained for the effectiveness of several of the same powdered inhibitors against methane-air explosions. Their relative order of effectiveness and the concentration ranges required for quenching the gas explosion are comparable to those measured for coal dust explosions. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Dust Explosions Methane Mining Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• ISSN:
  1066-5552 (print)
• Publisher:
  United States. Bureau of Mines
• Document Type:
  Text
• Genre:
  Case Report
• Rights:
  Public Domain
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  38 pdf pages
• Contributor:
  Corpus, W. ; Guinessey, J. ; Leff, Jerry ; Ng, Daniel L. ; Opferman, John J. ; Papp, J. ; Roll, L. ; Weldon, T.
• NIOSHTIC Number:
  nn:10002646
• Citation:
  NTIS: PB83/178723; :1-29
• Federal Fiscal Year:
  1982
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB83/178723
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:6b369713b6bee49301d8930cb4ac257f6a98020994d21922f62a3964f41321b56b8a2dfdc2dc63ebed6cac9da83edc3cb4f8fb0eca2df6e8d83d75036c90fb80
• Download URL:
  https://stacks.cdc.gov/view/cdc/201755/cdc_201755_DS1.pdf
• File Type:
  [PDF - 2.20 MB ]