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Mining Publication: Removing Booster Influences From Toxic Fumes
Keywords: Explosives Fumes
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: February 1999
Authors: MS Wieland
Conference Paper - February 1999
Download PDF Document (7.80 MB)
NIOSHTIC2 Number: 20025149
Proceedings of the 25th Annual Conference on Explosives and Blasting Technique, Nashville, Tennessee, February 7-10, 1999. Cleveland, OH: International Society of Explosives Engineers, 1999; 2:11-28
This report investigates whether it is tractable and thereupon reasonable to remove the booster influences when ranking the toxic fumes for non-cap-sensitive mining explosives. The hazard potential is represented by relative fume toxicity RFT, the resultant influence computed from a formulated rule with a restricted set (tally) of fume components and multiplying constants. The RFT result is compared to the rule criterion that represents the worst case tolerable toxicity stipulated by regulations or otherwise. The typical nonstoichiometric booster composition can render notable unwanted influence on the RFT ranking results. Historically, the remedy was to shoot the booster separately and reduce the trial concentrations by the relevant subtractions. Unreal negative concentration results were noted on rare occasions, revealing the faulty nature of the reduction procedure. With thermodynamic reaction chemistry codes TDRC, on the other hand, the booster ingredients can be retained in or removed from the reactant tabulation, yielding reduction factors taken as the concentration ratios for the two circumstances. The underlying presumption regarding reduction factors is that the ratios of component concentrations with and without the booster ingredients when resolved theoretically ought to equal those rendered experimentally, when tractable. Upon rearranging the presumed relationship, the unadjusted fume concentrations divided by theoretical reduction factors yield the wanted readjusted fume concentrations, thereby removing the booster influence without generating unreal negative concentrations.
Image of publication Removing Booster Influences From Toxic FumesConference Paper - February 1999
Download PDF Document (7.80 MB)
NIOSHTIC2 Number: 20025149
Proceedings of the 25th Annual Conference on Explosives and Blasting Technique, Nashville, Tennessee, February 7-10, 1999. Cleveland, OH: International Society of Explosives Engineers, 1999; 2:11-28
See Also
Behavior of Nitrogen Oxides in the Product Gases from Explosive Detonations
Blasting and Explosives
The Calculated Risk of Experiencing a Lightning Caused Unplanned Detonation
Evaluation of a Sheathed Permissible Explosive Charge for Open Shooting in Flammable Atmospheres
Field Method for the Determination of Insoluble or Total Hexavalent Chromium in Workplace Air
Gas and Fume Generation at the Blast Site
Handling Explosives in Underground Mines
Performance of RETIMET Metal Foam Vents on Explosion-Proof Enclosures
A Primer on Explosives for Coal Miners
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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