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CFD modelling of nitrogen injection in a longwall gob area.

Authors
Yuan-L; Smith-AC
Source
Int J Min Miner Eng 2014 Apr-Jun; 5(2):164-180
NIOSHTIC No.
20044316
Abstract
This paper describes computational fluid dynamics (CFD) simulations conducted to investigate the effectiveness of N2 injection in an active panel and a sealed longwall gob area to prevent and suppress spontaneous heating of coal using various injection locations and flow rates. In the active panel simulations, a single longwall panel with a bleederless ventilation system was simulated. The spontaneous heating of crushed coal from pillars was simulated and N2 was injected from different locations on the headgate side and through boreholes from the surface. The N2 injection rate at each location was varied between 0.18 m3/s and 0.94 m3/s (380 and 2000 cfm). In the sealed longwall simulations, seal leakage rate was varied to determine its effect on N2 injection effectiveness. The results of this study should aid mine ventilation engineers in developing more effective N2 injection strategies to prevent and control spontaneous heating of coal in underground coal mines.
Keywords
Mining-industry; Underground-mining; Coal-mining; Longwall-mining; Models; Ventilation; Ventilation-systems; Mine-gases; Spontaneous-combustion; Author Keywords: spontaneous combustion; longwall gob; CFD modelling; computational fluid dynamics; simulation; nitrogen injection; ventilation system; flow rates; coal mining; bleederless ventilation; mine ventilation; underground mines
Contact
Liming Yuan, Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, P.O. Box 18070, Cochrans Mill Road, Pittsburgh, PA 15236, USA
CODEN
IJMMKL
Publication Date
20140401
Document Type
Journal Article
Email Address
Lcy6@cdc.gov
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M052014
Issue of Publication
2
ISSN
1754-890X
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
International Journal of Mining and Mineral Engineering
State
PA
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