Approaches to estimation of run-out distances for liquefied tailings

Authors: Seddon, KD

DOI https://doi.org/10.36487/ACG_rep/1008_06_Seddon

Cite As:
Seddon, KD 2010, 'Approaches to estimation of run-out distances for liquefied tailings', in R Jewell & AB Fourie (eds), Mine Waste 2010: Proceedings of the First International Seminar on the Reduction of Risk in the Management of Tailings and Mine Waste, Australian Centre for Geomechanics, Perth, pp. 63-70, https://doi.org/10.36487/ACG_rep/1008_06_Seddon

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Abstract:
Estimates of runout distance of liquefied tailings from a failed dam may use strength-based approaches using either rheological parameters, or the critical state concept of undrained steady state strength. Problems associated with selection of rheological parameters are discussed. It is proposed that a reasonable approach is the assumption usy s=τ and 0=pη . Energy/work based methods are used as a check on this assumption and found to give good agreement. The effect of assumptions regarding the volume of material incorporated in the slide area is also investigated using the energy-based equations. The results indicate that there is a limiting volume, above which significant increases in the runout distance do not occur.

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