Unsaturated behaviour of tailings during deposition and desiccation cycles with reference to closure design

Chapman, P. J., Williams, D. J. and Rohde, T. K. (2009). Unsaturated behaviour of tailings during deposition and desiccation cycles with reference to closure design. In: O. Buzzi, S. Fityus and D. Sheng, Unsaturated soils: Experimental studies in unsaturated soils and expansive soils. 4th Asia Pacific Conference on Unsaturated Soils, Newcastle, Australia, (477-482). 23 - 25 November 2009.

Author Chapman, P. J.
Williams, D. J.
Rohde, T. K.
Title of paper Unsaturated behaviour of tailings during deposition and desiccation cycles with reference to closure design
Conference name 4th Asia Pacific Conference on Unsaturated Soils
Conference location Newcastle, Australia
Conference dates 23 - 25 November 2009
Proceedings title Unsaturated soils: Experimental studies in unsaturated soils and expansive soils
Journal name Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils
Place of Publication Leiden, Netherlands
Publisher CRC Press/Balkema
Publication Year 2009
Year available 2009
Sub-type Fully published paper
ISBN 9780415804806
Editor O. Buzzi
S. Fityus
D. Sheng
Start page 477
End page 482
Total pages 6
Collection year 2010
Language eng
Abstract/Summary The conventional deposition of mine tailings as a slurry in seepage, with the potential to contaminate surface and ground waters, particularly during deposition, and possibly post-closure. In a dry climate, tailings deposition can be cycled to largely evaporate excess water, and on closure the tailings may remain desiccated to the extent that incidental rainfall will not result in continued seepage and contamination of the surrounding environment. To provide supporting information for the selection of appropriate closure design criteria, and to provide information relating to the unsaturated behaviour of tailings during deposition and desiccation cycles, a trial tailings cell at a mine in arid Western Australia has been instrumented with moisture and suction sensors located on towers placed prior to tailings deposition. Tailings were deposited over 18 months in a series of lifts and the resulting desiccation and rewetting cycles were monitored by the instrumentation. This paper describes the life cycle of tailings deposition and desiccation, presents the moisture and suction data collected during the deposition and desiccation phases, provides a commentary on the results, and recommends some design parameters for the design of a suitable cover system for the tailings storage facility (TSF) at the site.
Subjects E1
090501 Civil Geotechnical Engineering
849804 Management of Solid Waste from Mineral Resource Activities
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status Unknown

 
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Created: Tue, 27 Apr 2010, 16:31:34 EST by Jeannette Watson on behalf of School of Civil Engineering