Inertisation of highwall mining to control methane concentrations at the Moura mine

Paper


Mossad, Ruth, Vella, Anthony and Balusu, Rao. 2009. "Inertisation of highwall mining to control methane concentrations at the Moura mine." Witt, P. J. and Schwarz, M. P. (ed.) 7th International Conference on Computational Fluid Dynamics in the Minerals and Process Industries (CFD 2009). Melbourne, Australia 09 - 11 Dec 2009 Melbourne, Australia.
Paper/Presentation Title

Inertisation of highwall mining to control methane concentrations at the Moura mine

Presentation TypePaper
AuthorsMossad, Ruth (Author), Vella, Anthony (Author) and Balusu, Rao (Author)
EditorsWitt, P. J. and Schwarz, M. P.
Journal or Proceedings TitleProceedings of the 7th International Conference on Computational Fluid Dynamics in the Minerals and Process Industries (CFD2009)
ERA Conference ID60410
Number of Pages6
Year2009
Place of PublicationMelbourne, Australia
ISBN9780643098251
Web Address (URL) of Paperhttp://www.cfd.com.au/cfd_conf09/PDFs/004MOS.pdf
Conference/Event7th International Conference on Computational Fluid Dynamics in the Minerals and Process Industries (CFD 2009)
International Conference on CFD in the Minerals and Process Industries
Event Details
7th International Conference on Computational Fluid Dynamics in the Minerals and Process Industries (CFD 2009)
Event Date
09 to end of 11 Dec 2009
Event Location
Melbourne, Australia
Event Details
International Conference on CFD in the Minerals and Process Industries
Abstract

Methane, a highly explosive gas, which is released during
coal mining, presents an imminent problem when mixed with oxygen in regard to maintaining safe working conditions. The Moura Mine's previous highwall coal mining operation in Central Queensland identified that production rates and penetration depths of mining equipment has been restricted for mines with high methane concentrations in comparison to regions with lower methane concentrations. A number of inert gases have been identified to inertise the highwall drive, including Carbon Dioxide, Nitrogen and Boiler Gas,
which is a combination of carbon dioxide, oxygen and
nitrogen. The objective of this paper is to determine
which of these gases is the most effective in improving the
mine's efficiency with regard to safety and production
rates at a chosen penetration depth of 300m. A 2D, steady, non-reacting species transport model of the highwall drive was used to obtain methane and oxygen concentrations using CFD software (Fluent). Results indicate that applying the inert gases at high angles is more effective in minimising the methane/oxygen concentrations within the drive than at lower angles.
Carbon Dioxide was the most effective when applied at a
60 degree angle, followed closely by Nitrogen, while
Boiler Gas came last.

Keywordsventilation; methane; highwall; mining
ANZSRC Field of Research 2020401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
401905. Mining engineering
401706. Numerical modelling and mechanical characterisation
Public Notes

© 2009 CSIRO Australia. This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.

Byline AffiliationsDepartment of Mechanical and Mechatronic Engineering
Faculty of Engineering and Surveying
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
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