University of Tasmania

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

conference contribution
posted on 2023-05-23, 15:26 authored by Ashley DysonAshley Dyson, Moghaddam, MS, Zad, A, Ali TolooiyanAli Tolooiyan
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.


Publication title

Proceedings of 20th International Conference on Soil Mechanics and Geotechnical Engineering


MM Rahman & M Jaksa






School of Engineering

Event title

20th International Conference on Soil Mechanics and Geotechnical Engineering

Event Venue

Sydney, Australia

Date of Event (Start Date)


Date of Event (End Date)


Repository Status

  • Restricted

Socio-economic Objectives

Coal mining and extraction; Mining and extraction of energy resources not elsewhere classified