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Simulation of spontaneous heating in longwall gob areas with a bleederless ventilation system.

Authors
Smith-AC; Yuan-L
Source
Min Eng 2008 Aug; 60(8):61-66
NIOSHTIC No.
20034235
Abstract
Although only used in a few U.S. longwall mines, bleederless ventilation systems can be an effective spontaneous combustion control method in mines having a demonstrated history of spontaneous combustion. To provide insights for the optimization of bleederless ventilation systems for U.S. underground coal mines, a computational fl uid dynamics (CFD) study was conducted to model the spontaneous heating in longwall gob areas using a bleederless ventilation system. A single longwall panel with a bleederless ventilation system was simulated, and typical longwall mine ventilation data were used in the simulations. The permeability and porosity profi les for the longwall gob were estimated using a geotechnical model and were used as inputs for the CFD modeling. The effects of gob permeability and resistance of the collapsed entries on the spontaneous heating were studied. The effectiveness of using nitrogen injection to prevent spontaneous heating in the gob was also examined.
Keywords
Mining-industry; Underground-mining; Ventilation; Ventilation-systems; Longwall-mining; Coal-mining; Models; Computer-models; Explosion-prevention; Fire-prevention; Spontaneous-combustion
CODEN
MIENAB
Publication Date
20080801
Document Type
Journal Article
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Issue of Publication
8
ISSN
0026-5187
NIOSH Division
PRL
Priority Area
Mining
Source Name
Mining Engineering
State
PA
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