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, Australian Centre for Geomechanics, Perth, pp. 347-360, https://doi.org/10.36487/ACG_rep/1008_30_Dillon
Historically, in situ testing of tailings has been primarily based on drilling techniques with the recovery of
tube samples, coupled with standard penetration test (SPT), shear vane testing and laboratory test work used
to assess the tailings properties. These techniques have limitations. In more recent time, the uses of cone
penetrometer testing (CPTu) and associated analytical techniques have lead to an improved understanding
of tailings in situ properties.
A combination of both drilling and CPTu techniques is considered appropriate for identifying the key
engineering properties of tailings. The results of the investigation can then be used in both stability and
seismic liquefaction analyses.
Results from the investigation of two different tailing deposition regimes are presented together with their
strength and liquefaction assessments.
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