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

Mossad, Ruth and Vella, Anthony and Balusu, Rao (2009) Inertisation of highwall mining to control methane concentrations at the Moura mine. In: 7th International Conference on Computational Fluid Dynamics in the Minerals and Process Industries (CFD2009), 9-11 Dec 2009, Melbourne, Australia.

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.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author's version not held.
Depositing User: Dr Ruth Mossad
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 13 Oct 2010 11:12
Last Modified: 02 Jul 2013 23:34
Uncontrolled Keywords: ventilation; methane; highwall; mining
Fields of Research (FOR2008): 09 Engineering > 0915 Interdisciplinary Engineering > 091501 Computational Fluid Dynamics
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091405 Mining Engineering
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9601 Air Quality > 960105 Mining Air Quality
URI: http://eprints.usq.edu.au/id/eprint/6477

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