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Explosion pressure design criteria for seals in U.S. coal mines - an update on work at NIOSH.

Authors
Zipf-RK Jr.; Brune-JF; Thimons-ED
Source
Mine Ventilation: Proceedings of the Ninth International Mine Ventilation Congress, New Delhi, India, November 10-13, 2009. Panigrahi DC, ed., New Delhi, India: Oxford & IBH Publishing Co. Pvt. Ltd., 2009 Nov; 1:123-132
Link
NIOSHTIC No.
20036197
Abstract
A fatal explosion in a sealed area at the Sago Mine in 2006 prompted researchers and regulators in the United States to re-examine the requirements for explosion-resistant mine seals. Seals are used in underground coal mines to isolate abandoned mining areas from active workings. Prior to the Sago disaster, mining regulations required seals to withstand a 140 kPa explosion pressure. Recent research at the National Institute for Occupational Safety and Health (NIOSH) Pittsburgh Research Laboratory showed that pressures from explosions can far exceed this pressure. U.S. mining regulations now require much stronger seals. Current research focuses on understanding the science, engineering and management of sealed areas of coal mines. Scientific efforts seek understanding of how explosive methane-air mixtures accumulate using measurements and models of the sealed area atmosphere. Additional scientific efforts aim to understand the explosion pressures that can develop using a combination of numerical modeling and experiments. Engineering efforts aim to produce design guidelines for seals that can resist the new higher pressure design criteria. NIOSH researchers are also developing guidance for monitoring of sealed area atmospheres and inertization of potentially explosive gas mixtures within sealed areas. This paper seeks to encourage scientific discussion among international peers since preventing explosions within sealed areas is of interest to underground coal operators and regulators.
Keywords
Mining-industry; Underground-mining; Coal-mining; Mine-seals; Explosion-protection; Explosion-prevention; Mining-equipment; Engineering-controls; Control-technology; Explosions; Author Keywords: seals; explosion pressure; coal mining
Contact
R. Karl Zipf Jr, NIOSH - Pittsburgh Research Laboratory, P.O. Box 18070,626 Cochrans Mill Rd. Pittsburgh, PA 15236
Publication Date
20091101
Document Type
Conference/Symposia Proceedings
Email Address
rzipf@cdc.gov
Editors
Panigrahi-DC
Fiscal Year
2010
NTIS Accession No.
NTIS Price
ISBN No.
9788120417496
NIOSH Division
PRL
Priority Area
Mining
Source Name
Mine Ventilation: Proceedings of the Ninth International Mine Ventilation Congress, New Delhi, India, November 10-13, 2009
State
PA
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