Western Australia Chapter

Geotechnical Investigation of a Large Tailings Facility

Peter K. Robertson, Technical Director, Gregg Drilling & Testing Inc.

The talk will present a case history of a recent geotechnical investigation for a large tailings facility in South America where liquefaction was a major design issue. The investigation involved seismic Cone Penetration Tests with pore pressure measurements (SCPTu) as well as conventional boreholes, SPT and samples.

The presentation will describe the tailings deposit, site investigation and laboratory results and summarizes the liquefaction analyses. The main design issue was flow liquefaction and loss in the tailings.

Engineers Australia members participating in AGS technical sessions can record attendance on their personal CPD logs. Members should refer to Engineers Australia CPD policy for details on CPD types, requirements and auditing guidelines.