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Title Float coal dust explosion hazards.

Imprint [Pittsburgh, PA] : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, [2006]


Location Call No. OPAC Message Status
 Axe Federal Documents Online  HE 20.7132/2:515    ---  Available
Description 2 unnumbered pages : digital, PDF file.
text txt rdacontent
computer c rdamedia
online resource cr rdacarrier
Series Technology news ; no. 515
DHHS (NIOSH) publication ; no. 2006-125
DHHS publication ; no. (NIOSH) no. 2006-125.
Technology news (National Institute for Occupational Safety and Health) ; no. 515.
System Details Mode of access: Internet from the CDC web site. Address as of 03/18/08:; current access available via PURL.
Note Title from title screen (viewed on Mar. 18, 2008).
"Milestones in Mining Safety and Health Technology."
"April 2006."
Summary "In underground coal mining, dust is produced at the face, at conveyors, at transfer points, and by the normal movement of workers and machines. The coarse coal dust particles settle rapidly. However, the fine coal particles remain airborne much longer, and the ventilating air can move this fine dust relatively long distances into the returns before settling. This fine dust is called float coal dust. It generally consists of particles of coal that pass a 200-mesh sieve (particles smaller than 75 micrometers). Generalized rock dusting is currently the primary means of defense against coal dust explosions in U.S. mines. 30 CFR 75, Subpart E (Combustible Materials and Rock Dusting), requires the use of rock dust in bituminous coal mines (30 CFR 75.402). The regulations state that rock dust shall be distributed upon the top, floor, and sides of all underground areas of a coal mine in such quantities that the incombustible content of the combined coal dust, rock dust, and other dust shall be not less than 65%, and the incombustible content in the return air courses (where the dust is expected to be finer) shall be no less than 80% (30 CFR 75.403). These incombustible concentrations assume that the coal and rock dust are not layered, but are intimately mixed. Float coal dust is a serious explosion hazard if it accumulates on top of the rock dust and is not mixed thoroughly with the rock dust."--NIOSHTIC-2.
Subject Coal dust -- United States.
Coal dust. (OCoLC)fst01738706
United States. (OCoLC)fst01204155
Added Author Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)
Gpo Item No. 0499-F-27 (online)
Sudoc No. HE 20.7132/2:515

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