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Coal dust inerting and post-explosion dust sampling research in a 1-m3 laboratory chamber and an experimental mine.
Cashdollar KL; Going JE
Proceedings of the 2003 Technical Meeting of Eastern States Section of Combustion Institute. Pittsburgh, PA: Combustion Institute, 2003 Oct; :97-100
The Pittsburgh Research Laboratory of the National Institute for Occupational Safety and Health and Fike Corp. jointly conducted research on the explosibility and inerting of coal dusts in a 1-m3 (1,000-L) laboratory chamber. The data are compared to those from a 20-L laboratory chamber and an experimental mine. The primary purpose of this research was to improve safety in coal mining, but the data are also useful to other industries that use combustible dusts. In the coal mining industry, rock dust (usually limestone) is added the coal dust deposits to act as a heat sink and inhibit flame propagation. If sufficient rock dust is added to the coal dust, the mixture is rendered inert. The rock dusting regulations are based on the results of full-scale experimental mine tests. A goal of the laboratory inerting research is to determine whether one can find test procedures that produce comparable results to the mine tests. Postexplosion dust samples were also collected form both the 1-m3 laboratory chamber and mine experiments to compare the pre- and postexplosion incombustible contents. These data will be useful in future forensic investigations of mine explosion accidents.
Explosions; Explosive-atmospheres; Explosive-dusts; Explosive-hazards; Coal-dust; Coal-mining; Underground-mining; Safety-measures; Safety-practices; Safety-research; Combustibility
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
Proceedings of the 2003 Technical Meeting of the Eastern States Section of the Combustion Institute