Understanding and Modelling a Highly Ductile 25+ Years Old Active-Passive Landslide at Ok Tedi Mine in Papua New Guinea
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Open image in new window The Ok Tedi Copper-Gold Mine is located in a rugged, mountainous region of the Western Province of Papua New Guinea that receives exceptionally high rainfall and is prone to seismic activity. Geologic and geotechnical conditions in the region are also complex and often unfavorable and contribute to slope instability and landslide activity. Very few suitable areas exist around the mine for the construction of infrastructure facilities. Most of the existing infrastructure is located on terraced areas developed by cut-and-fill earthworks. This paper describes the most recent efforts undertaken in attempt to model and understand a highly ductile active-passive landslide that has deformed in the order of 30 m on New York Ridge in the northern part of Ok Tedi Mine for over 25 years.
KeywordsActive-passive landslides Slope stability Numerical modelling
The authors acknowledge the efforts of Dr. John Read, Richard Mould, John Braybrooke, Simon Thomas, Robert Parker, Jason Elemunop and the late Dr Barry McMahon for their contributions to the New York Ridge project over the years.
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