Impact of tailings subsidence on rehabilitated landform erosional stability

Houghton, Richard (2009) Impact of tailings subsidence on rehabilitated landform erosional stability. [USQ Project] (Unpublished)

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Abstract

As a mine gets closer to the end of its productive life, rehabilitation of the site for its release back into the surrounding environment involves disposal of toxic, saturated fine grained tailings derive from ore processing. Tailings disposal back into the excavated pit and capping the site with a landform to isolate them from the environment is an accepted method of mine rehabilitation. The predicted long term stability of the landform due to the influence of tailings compression is a key factor to be considered in the design of the landform. The project investigates the settlement that had occurred at a mine site that was rehabilitated using this method of rehabilitation. The total settlement of the landform is quantified by comparing historical surface information to the existing surface level as determined by conducting a topographic survey. Current griding and mapping technology were also used to assist in the quantifying process. Using historic mine, landform design and construction information a consolidation model is presented base on Terzaghis one dimesional consolidation theory. This model is then calibrated to the landforms maximum recorded settlement. The findings presented provide a basis for further development towards designing capped tailings landforms with long term stability.


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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 18 Nov 2009 00:44
Last Modified: 02 Jul 2013 23:29
Uncontrolled Keywords: tailing subsidence; rehabilitated landform; erosional stability
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
URI: http://eprints.usq.edu.au/id/eprint/6170

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