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Mining Publication: Relationships Between Electrostatic Charging Characteristics, Moisture Content, and Airborne Dust Generation for Subbituminous and Bituminous Coals
Keywords: Bituminous coal Subbituminous coal
Original creation date: April 2000
Authors: SJ Page
Peer Reviewed Journal Article - April 2000
Go to Web Page
NIOSHTIC2 Number: 20020769
Aerosol Sci Tech 2000 Apr; 32(4):249-267
Small scale laboratory pulverizing experiments were performed on humidified coal material sieved to size 6.35 mm (0.250 in) and below to eliminate effects due to inherent planes of weakness (cleats or joints). Experimental factors studied include the coal seam proximate analysis constituents, the breakage-induced electrostatic field of airborne dust, and the specific airborne dust generated. Results of these pulverizing experiments show that only coals below 1-2% air dry loss (ADL) moisture content are in a highly charged state after pulverization and that the amount of charging decreases rapidly with increasing ADL up to 1-2%. This appears to have a direct effect on the specific dust generation characteristics of coals. However, each coal may have its own characteristic dust charge and generation signature. Underground dust samples obtained in coal seams with inherent moisture contents ranging from 0.5 to 4.5% suggest that significant particle agglomeration exists for the 0.5% inherent moisture coal but not the coals with moisture > 1.3% inherent moisture, in agreement with the laboratory tests.
Peer Reviewed Journal Article - April 2000
Go to Web Page
NIOSHTIC2 Number: 20020769
Aerosol Sci Tech 2000 Apr; 32(4):249-267
See Also
Cleat in Bituminous Coalbeds
Evaluation of the SKC� DPM Cassette for Monitoring Diesel Particulate Matter in Coal Mines
Investigation of Coal Properties and Airborne Respirable Dust Generation
Methane Emission from U.S. Coal Mines in 1975, A Survey : A Supplement to Information Circulars 8558 and 8659
Methane Emission from U.S. Coal Mines, A Survey
Methane Emissions from U.S. Coal Mines in 1980
Methane Gas Content of the Mary Lee Group of Coalbeds, Jefferson, Tuscaloosa, and Walker Counties, Ala.
Post-Explosion Observations of Experimental Mine and Laboratory Coal Dust Explosions
Short-Delay Blasting in Underground Coal Mines
Using Proximate Analysis to Characterize Airborne Dust Generation from Bituminous Coals
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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