Centrifuge tests on comixing of mine tailings and waste rock

Nonika Antonaki, Tarek Abdoun, Inthuorn Sasanakul

    Research output: Contribution to journalArticle

    Abstract

    A series of centrifuge tests were conducted to examine self-weight consolidation, dynamic response, liquefaction potential, and slope stability of mine tailings alone and in mixtures with waste rock. Mixture ratio of waste rock to tailings by dry mass varied around the region of a rock skeleton just-filled with liquefiable mine tailings (roughly 2.3:1 in this case). The performance of three mixtures was compared to that of tailings in terms of pore pressure dissipation, shear wave velocity, soil acceleration, lateral displacement, pore pressure buildup, liquefied depth, settlement, and slope stability. Comixing proved to be a promising alternative to conventional separate disposal. Consolidation time and settlement were reduced significantly, and shear wave velocity increased with increasing rock content. The improvement in dynamic response was not pronounced when the tailings proportion was larger than required to fill the rock skeleton but became very apparent when that ratio was reached or surpassed.

    Original languageEnglish (US)
    Article number04017099
    JournalJournal of Geotechnical and Geoenvironmental Engineering
    Volume144
    Issue number1
    DOIs
    StatePublished - Jan 1 2018

    Fingerprint

    Centrifuges
    Tailings
    centrifuge
    tailings
    Rocks
    Slope stability
    rock
    Shear waves
    Pore pressure
    dynamic response
    slope stability
    Consolidation
    pore pressure
    skeleton
    Dynamic response
    wave velocity
    consolidation
    S-wave
    Liquefaction
    liquefaction

    ASJC Scopus subject areas

    • Environmental Science(all)
    • Geotechnical Engineering and Engineering Geology

    Cite this

    Centrifuge tests on comixing of mine tailings and waste rock. / Antonaki, Nonika; Abdoun, Tarek; Sasanakul, Inthuorn.

    In: Journal of Geotechnical and Geoenvironmental Engineering, Vol. 144, No. 1, 04017099, 01.01.2018.

    Research output: Contribution to journalArticle

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