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The effect of geotechnical creep on the safety and reliability of rehabilitated mine pit-lake slopes


Dyson, AP and Moghaddam, MS and Zad, A and Tolooiyan, A, The effect of geotechnical creep on the safety and reliability of rehabilitated mine pit-lake slopes, Proceedings of 20th International Conference on Soil Mechanics and Geotechnical Engineering, 1-5 May 2022, Sydney, Australia, pp. 1-4. ISBN 978-0-9946261-4-1 (2022) [Refereed Conference Paper]

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Pit-lakes are gaining increasing attention as a method for large open-pit mine rehabilitation. Large void spaces are filled with water, providing a confining pressure on mine surfaces, decreasing the risk of slope failure, while also reducing the required level of slope maintenance. Although pit lake rehabilitation scenarios present a long-term option for maintaining the stability of mine slopes, soils susceptible to creep under increasing loads due to mine filling presents a risk to long term stability. From a geotechnical point of view, soil creep is generally attributed to slow, downslope movement, where creep movements often decelerate until a critical strain produces a creep failure event. In this research, time-dependent slope stability models of creep-sensitive soils are presented, identifying varying levels of deformation based on mine filling rates and durations. The ability to achieve a final stable landform under a variety of long-term creep conditions is discussed.

Item Details

Item Type:Refereed Conference Paper
Keywords:scaled boundary finite element method, slope stability, spatial variation, image-based analysis, quadtreee mesh
Research Division:Engineering
Research Group:Civil engineering
Research Field:Civil geotechnical engineering
Objective Division:Energy
Objective Group:Mining and extraction of energy resources
Objective Field:Coal mining and extraction
UTAS Author:Dyson, AP (Dr Ashley Dyson)
UTAS Author:Tolooiyan, A (Dr Ali Tolooiyan)
ID Code:151588
Year Published:2022
Deposited By:Engineering
Deposited On:2022-08-02
Last Modified:2023-01-10

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