Centrifuge Modeling of Mine Tailings and Waste Rock Co-Disposal, Consolidation, and Dynamic Loading

Nonika Antonaki, Tarek Abdoun, Inthuorn Sasanakul

    Research output: Contribution to journalConference article

    Abstract

    Tailings from a planned copper-gold mining project located at the earthquake-prone Andean region of South America were obtained from the metallurgical pilot plant in order to perform centrifuge tests at the center for earthquake engineering simulation (RPI). Consolidation and shaking table tests were conducted to evaluate the properties and liquefaction potential of mildly sloped consolidated mine tailings. A gentle slope at the surface of a tailings impoundment can significantly add to the stored volume. Due to long consolidation time, large settlement and clear signs of liquefaction after a few cycles of dynamic loading, the need for improvement arose. One of the alternative management methods that can improve physical stability and geochemical properties is co-disposal of mine tailings and waste rock. In this study, co-mixing of the materials at a specified ratio of dry mass (waste rock to tailings) prior to disposal was examined. The behavior was compared to that of tailings with respect to consolidation rate, settlement accumulation, slope stability and response to dynamic loading. In the field, the tailings are thickened and hydraulically deposited into the containment structure in layers. In the centrifuge, tailings were prepared in layers and consolidated, thus allowing instrumentation of each layer before consolidation of the complete impoundment.

    Original languageEnglish (US)
    Pages (from-to)245-254
    Number of pages10
    JournalGeotechnical Special Publication
    Volume2016-January
    Issue number270 GSP
    DOIs
    StatePublished - Jan 1 2016
    Event2nd Geo-Chicago Conference: Geotechnics for Sustainable Energy, Geo-Chicago 2016 - Chicago, United States
    Duration: Aug 14 2016Aug 18 2016

    Fingerprint

    centrifugal model test
    Centrifuges
    Tailings
    Waste disposal
    Consolidation
    tailings
    consolidation
    Rocks
    rock
    Liquefaction
    impoundment
    centrifuge
    liquefaction
    Copper gold mines
    shaking table test
    Slope stability
    earthquake engineering
    containment
    slope stability
    Pilot plants

    ASJC Scopus subject areas

    • Architecture
    • Civil and Structural Engineering
    • Building and Construction
    • Geotechnical Engineering and Engineering Geology

    Cite this

    Centrifuge Modeling of Mine Tailings and Waste Rock Co-Disposal, Consolidation, and Dynamic Loading. / Antonaki, Nonika; Abdoun, Tarek; Sasanakul, Inthuorn.

    In: Geotechnical Special Publication, Vol. 2016-January, No. 270 GSP, 01.01.2016, p. 245-254.

    Research output: Contribution to journalConference article

    Antonaki, Nonika ; Abdoun, Tarek ; Sasanakul, Inthuorn. / Centrifuge Modeling of Mine Tailings and Waste Rock Co-Disposal, Consolidation, and Dynamic Loading. In: Geotechnical Special Publication. 2016 ; Vol. 2016-January, No. 270 GSP. pp. 245-254.
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