Static liquefaction is a geotechnical hazard in mine tailings facilities._x000D_
Soils that are contractive in shear are susceptible to static liquefaction._x000D_
Tailings facilities are dynamic structures, typically growing in height each year. Dilative tailings may become contractive under increased effective stress._x000D_
In this paper we show that Cone Penetration Test (CPT) data can be used to estimate the future state of in-place tailings under changes in effective stress._x000D_
Susceptibility to static liquefaction is typically evaluated with the CPT by using a clean-sand equivalent normalized cone tip resistance (Qtn,cs) or by estimating the state parameter (y)._x000D_
An alternative approach is to evaluate the soil-state using the yield-stress-ratio (YSR = s'y/s'v0)._x000D_
If the YSR equals one it is on the normal consolidation line and the soil-state is contractive._x000D_
YSR values greater than three are typically dense of the critical state line (CSL) and the soil-state is dilative._x000D_
In this paper we review how to calculate Qtn,cs, y, and s'y; and how the YSR can be used to screen for contractive soil behaviour._x000D_
Unlike Qtn,cs and y, it is very simple to estimate how the YSR will change due to an increase in overburden stress._x000D_
This YSR approach was evaluated at three locations that saw increases in overburden of 10 m, 20 m, and 25 m._x000D_
We show that the s'y calculations are consistent and the increase in effective stress moves the soil state towards looser soil states._x000D_
CITATION:Styler, M A, Mayne, P W, McGowan, D and Sharp, J T, 2018. Predicting changes in static liquefaction susceptibility using cone penetration test results, in Proceedings Mine Waste and Tailings Stewardship Conference 2018, pp 317-332 (The Australasian Institute of Mining and Metallurgy: Melbourne).