Shear strength parameters for assessing geotechnical slope stability of open pit coal mine spoil based on laboratory tests

Kho, A. K., Williams, D. J., Kaneko, N. and Smith, N. J. W. (2013). Shear strength parameters for assessing geotechnical slope stability of open pit coal mine spoil based on laboratory tests. In: Phil M. Dight, Slope Stability 2013: Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering. Slope Stability 2013, Brisbane, QLD, Australia, (867-880). 25-27 September, 2013.

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Name Description MIMEType Size Downloads
Author Kho, A. K.
Williams, D. J.
Kaneko, N.
Smith, N. J. W.
Title of paper Shear strength parameters for assessing geotechnical slope stability of open pit coal mine spoil based on laboratory tests
Conference name Slope Stability 2013
Conference location Brisbane, QLD, Australia
Conference dates 25-27 September, 2013
Proceedings title Slope Stability 2013: Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering
Place of Publication Nedlands, WA, Australia
Publisher Australian Centre for Geomechanics
Publication Year 2013
Sub-type Fully published paper
Open Access Status
ISBN 9780987093752
Editor Phil M. Dight
Start page 867
End page 880
Total pages 14
Collection year 2014
Language eng
Formatted Abstract/Summary
As open pit coal mines venture to previously unchartered depths, the importance of ensuring the geotechnical slope stability of high spoil piles becomes critical. However, a reasonable understanding of material parameters under the high stresses involved is yet to be achieved. Of particular interest is the necessity and effectiveness of testing scalped specimens in the laboratory and applying the results obtained to actual mine spoil piles. In an attempt to better understand the implications of particle size on shear strength parameters of coal mine spoil materials, samples were retrieved for testing from four mine sites in Queensland and New South Wales. The sampling covered a range of spoil types from fresh, well-cemented sandstone to weakly-cemented, weathered clay-rich rock. Laboratory direct shear strength testing was undertaken in shear boxes of two sizes; 60 and 300 mm, to investigate the effects of scalping. Specimens were placed loose and tested at their as-sampled moisture content and in a water bath. This was aimed at better simulating mine site conditions in which initially relatively dry spoil is placed loose and is subsequently wet-up by rainfall infiltration. The paper presents the shear strength parameters obtained for spoil specimens tested in the laboratory, and compares these with data from the literature and recommended shear strength parameters, which has implications for assessing the geotechnical slope stability of coal mine spoil piles.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2014 Collection
 
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Created: Wed, 26 Mar 2014, 09:21:49 EST by Julie Hunter on behalf of School of Civil Engineering