Dynamic fragmentation of rock by high-voltage pulses

S. H. Cho, B. Mohanty, M. Ito, Y. Nakamiya, Shuji Owada, S. Kubota, Y. Ogata, A. Tsubayama, M. Yokota, K. Kaneko

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    8 Citations (Scopus)

    Abstract

    The purpose of this study is to develop a high-precision disintegration technology for extracting industrial minerals from rock matrices by applying high-voltage electrical pulses. The electrical disintegration of rock through application of high voltage electrical pulse is one of the effective liberation techniques for producing the high percentage of the monomineral particles in disintegration of mineral aggregates. Circular rock samples of three different types were fractured by applying electric pulses. The microstructure and fractures of the test samples were visualized and analyzed by using microfocus X-ray computed tomography (CT) system. The fracture patterns were simulated by using the dynamic fracture process analysis code and the fragmentation process resulting from electrical pulses were discussed. The influence of rock heterogeneity and sample size effect on the dynamic fragmentation was also discussed.

    Original languageEnglish
    Title of host publicationProceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics
    Publication statusPublished - 2006
    Event41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics - Golden, CO
    Duration: 2006 Jun 172006 Jun 21

    Other

    Other41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics
    CityGolden, CO
    Period06/6/1706/6/21

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    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geophysics

    Cite this

    Cho, S. H., Mohanty, B., Ito, M., Nakamiya, Y., Owada, S., Kubota, S., Ogata, Y., Tsubayama, A., Yokota, M., & Kaneko, K. (2006). Dynamic fragmentation of rock by high-voltage pulses. In Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics