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Abstract

In this study, permeabilities of Victorian Brown Coal (VBC) as an Australian soft rock are determined for a range of depths of a continuous coal seam located at the batter crest of the Yallourn brown coal open-cut mine in Victoria, Australia, by implementing a Lugeon packer testing procedure. Permeability values are determined both analytically and by numerical simulation and are compared with laboratory test results. Field testing resulted in permeabilities several orders of magnitude higher than laboratory testing, suggesting the existence of fractures common to lignite structures on a greater scale than can be observed in the laboratory. The variation of depth-based field and laboratory permeabilities is discussed, as well as the necessary conditions required for the numerical modelling of packer testing within VBC.

Item Type:	Article
Authors/Creators:	Tolooiyan, A and Dyson, AP and Karami, M and Shaghaghi, T and Ghadrdan, M
Keywords:	intermediate geotechnical material, Victorian brown coal, permeability, hydraulic conductivity, packer test
Journal or Publication Title:	Bulletin of Engineering Geology and The Environment
Publisher:	Springer
ISSN:	1435-9529
DOI / ID Number:	10.1007/s10064-019-01715-8
Copyright Information:	Copyright 2020 Springer
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