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Numerical study on spontaneous combustion of coal in U.S. longwall gob areas.

Authors
Yuan-L; Smith-AC
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; 1:263-271
Link
NIOSHTIC No.
20036226
Abstract
In order to reduce fire hazards caused by spontaneous combustion in longwall gob areas, a computational fluid dynamics (CFD) study is being conducted by National Institute for Occupational Safety and Health (NIOSH) to simulate the spontaneous heating of coal in longwall gob areas. A CFD model was first developed to model the spontaneous heating process in a two longwall panel district using a bleeder ventilation system with a stationary longwall face. The spontaneous heating is modeled as the low-temperature oxidation of coal in the gob using kinetic data obtained from previous laboratory-scale spontaneous combustion studies. Heat generated from coal oxidation is dissipated by convection and conduction, while oxygen and oxidation products are transported by convection and diffusion. CFD simulations were then conducted to model the spontaneous heating in longwall gob area with a bleederless ventilation system. A single longwall panel with a bleederless ventilation system was simulated. The effect of gob permeability on the spontaneous heating was also investigated.
Keywords
Coal-mining; Combustibility; Combustion-products; Control-technology; Engineering-controls; Fire-hazards; Fire-prevention; Heat; Heat-production; Longwall-mining; Mine-seals; Mining-equipment; Mining-industry; Modeling; Underground-mining; Ventilation; Ventilation-systems; Work-environment; Workplace-studies; Author Keywords: Spontaneous combustion; Coal; Longwall gob
Contact
Liming Yuan, 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
lcy6@cdc.gov
Editors
Panigrahi-DC
Fiscal Year
2010
NTIS Accession No.
NTIS Price
ISBN No.
9788120417496
NIOSH Division
PRL
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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