Ghulam Ali Hussaini, Dale Hone, Mohammad Emdadul Karim, Md Mizanur Rahman and Md Rajibul Karim
Recent failures of tailings dams have underscored the critical importance of enhancing the interpretation of the behaviour of tailings and foundation materials. This is particularly important when shear stress is applied under unique circumstances, e.g., heavily overconsolidated materials (such as natural foundation soils) under the influence of chemically aggressive tailings liquor. The behavioural aspects of the insitu soil may change due to the the presence of the tailings liquor containing salt. This study examines the effect of tailings liquor on the consolidation, permeability and shear behaviour of a natural foundation soil material. Block foundation subsoil specimens were collected from a tailing dam site in Australia. The critical state soil mechanics (CSSM) framework was used to evaluate the strength of block specimens with and without subjecting them to tailings liquor. The dam’s foundation material showed increased shear strength when subjected to tailings liquor with an increased friction angle. The critical (or residual) state points and normal consolidation lines for liquor-treated specimens shifted upward in void ratio-confining stress space.
Keywords: Block specimen, CSSM, CSL, Direct simple shear, Tailings liquor, Dam Foundation, Consolidation, Permeability
$15.00
ANCOLD is an incorporated voluntary association of organisations and individual professionals with an interest in dams in Australia.
System maintenance will be performed on the servers that host the ANCOLD Digital Guidelines, on Saturday, December 21st @ 10:00 PM AEDT which will require the servers to reboot.
Total downtime during that event could be up to 4 hours and will commence sharply at 10 pm AEDT. During that time end users will not be able to view or access their secured content.