Goaf drainage at Moranbah North Coal

Gray, Adam (2006). Goaf drainage at Moranbah North Coal B.Sc Thesis, School of Engineering, The University of Queensland.

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Author Gray, Adam
Thesis Title Goaf drainage at Moranbah North Coal
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2006
Thesis type B.Sc Thesis
Supervisor Saiied Aminossadati
Total pages 84
Language eng
Subjects 091405 Mining Engineering
Formatted abstract
The Australian underground coal industry is demanding greater production rates from gassier coal seams. This demand has increased tailgate gas concentrations within mines due an increase in specific emissions. Post drainage of a longwall goaf is required when current gas management plans are unable to manage increased gas specific emissions from the working and remote coal seams. Gas emission models indicate that a post drainage system is required at Moranbah North Coal (MNC) in future longwall panels. This is due to an increase in gas content of the remote coal seams as the depth increases combined with longwall geometry and longwall production requirements.

Two post drainage methods have been successfully applied within the Australian underground coal industry. These are cross-measure drainage and goaf drainage from surface boreholes. Goaf drainage from surface boreholes can be utilised at MNC, depending on borehole stability. The efficiency of a goaf drainage network is dependent on a combination of technological and geological factors which influence the success of goaf drainage from surface boreholes. 

The Flugge model has been applied to determine areas within individual longwall panels that require post drainage. The model identifies the required goaf gas capacity of the goaf drainage network. A goaf drainage network analysis can determine the required goaf fan specifications to overcome pressure losses within the system. While the primary objective of post drainage is to increase operator safety in the underground environment, there are various hazards associated with the introduction of goaf drainage. These risks can be minimised through ensuring appropriate controls are in place and implementing a detailed goaf drainage sequencing strategy. 
Keyword Mining Engineering Australia
Longwall mines

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
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Created: Wed, 03 Sep 2014, 16:11:22 EST by Jessica Minshull on behalf of Scholarly Communication and Digitisation Service