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Post-explosion observations of experimental mine and laboratory coal dust explosions.

Authors
Cashdollar-KL; Weiss-ES; Montgomery-TG; Going-JE
Source
J Loss Prev Process Ind 2007 Jul/Nov; 20(4-6):607-615
NIOSHTIC No.
20032561
Abstract
The Pittsburgh Research Laboratory (PRL) of the National Institute for Occupational Safety and Health (NIOSH) and the Mine Safety and Health Administration (MSHA) conducted joint research on dust explosions by studying post-explosion dust samples. The samples were collected after full-scale explosions at the PRL Lake Lynn Experimental Mine (LLEM), and after laboratory explosions in the PRL 20-L chamber and the Fike 1 m3 chamber. The dusts studied included both high- and low-volatile bituminous coals. Low temperature ashing for 24 h at 515 1C was used to measure the incombustible content of the dust before and after the explosions. The data showed that the post-explosion incombustible content was always as high as, or higher than the initial incombustible content. The MSHA alcohol coking test was used to determine the amount of coked dust in the post-explosion samples. The results showed that almost all coal dust that was suspended within the explosion flame produced significant amounts of coke. Measurements of floor dust concentrations after LLEM explosions were compared with the initial dust loadings to determine the transport distance of dust during an explosion. All these data will be useful in future forensic investigations of accidental dust explosions in coal mines, or elsewhere.
Keywords
Mining-industry; Coal-dust; Particulates; Particulate-dust; Dust-particles; Coal-mining; Analytical-processes; Explosive-dusts; Explosion-prevention
Contact
Kenneth L. Cashdollar, NIOSH, Pittsburgh Research Laboratory, P.O. Box 18070, Cochrans Mill Road, Pittsburgh, PA 15236
CODEN
JLPIE9
Publication Date
20070701
Document Type
Journal Article
Email Address
KCashdollar@cdc.gov
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Issue of Publication
4-6
ISSN
0950-4230
NIOSH Division
PRL
Source Name
Journal of Loss Prevention in the Process Industries
State
PA; MO; WV
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