Report of Investigations 9498: Coal Dust Explosibility and Particle-Size Distribution

Details

• Journal Article:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9498
• Personal Author:
  Chaiken, Robert F. ; Chaiken, Robert F.
• Description:
  An absorption/desorption model of particle reactivity was employed to describe the observed relationship between two apparently diverse phenomena which have been the subject of considerable study at the U.S. Bureau of Mines, viz. (1) coal/rock dust relfectance and (2) coal/rock dust explosibility. A mean particle size parameter, appropriate to the explosion extinction process, is derived, and then taken as appropriate to describing optical reflectance. The derived form-to-function relationships for the two processes, when compared with experimental data, suggest that a problem exists with previously derived theory relating optical reflectance to rock dust concentration. A reexamination of that theory leads to a new theoretical expression, changed by a factor of two, for the variation of rock dust concentration with reflectance which is in quite good agreement with experimental results. The current work offers justification for measuring and establishing rock dust requirements for specific coal dust size distribution(s) found in the mine-distributions which undoubtedly depend on the mining method and the type of coalbed. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Dust Mining Occupational Health Particulate Matter Safety
• Keywords:
  Underground-explosions; Autoignition; Reaction-kinetics; Size-distribution; Reflectance; Coal-mines; Mining-engineering; Mathematical-models; Coal-dust; Dust-explosions; Particle-size; Mineral-industries
• Source:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9498, 1994 Jan; :1-12 ; Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9498, 1994 Jan; :1-12
• Series:
  NIOSH Numbered Publications   ; Mining Publications   ; NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations ; Report of Investigations
• Document Type:
  Text
• Genre:
  Report ; Report
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center ; PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Pages in Document:
  18 pdf pages
• NIOSHTIC Number:
  nn:10005150
• NTIS Accession Number:
  PB94-173325
• Federal Fiscal Year:
  1994
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:95e83236c1d93352063430c01684501960b6c10e72bec6d4ddb14a29420e5482f100631f8055cfa8ffa9b128c31b0a9617050671a2ae66ce8edec503ac9125f9
• Download URL:
  https://stacks.cdc.gov/view/cdc/10081/cdc_10081_DS1.pdf
• File Type:
  [PDF - 819.56 KB ]