Low transient strength of hard rocks at spontaneous failure

Boris G. Tarasov

    Research output: Chapter in Book/Conference paperConference paper

    Abstract

    Post-peak properties of intact hard rocks (UCS > 250 MPa) at highly confined compression corresponding to seismogenic depths and shear rupture mechanism operating at these conditions are still experimentally unexplored due to spontaneous failure of extreme dynamics and violence. Recently conducted comprehensive analysis of different side effects accompanying the spontaneous failure resulted in the identification of a unique shear rupture mechanism according to which shear rupture propagation is governed by the fanshaped fracture head characterized by very low shear resistance (less than frictional strength). Such low shear resistance of the fan-head determines the transient strength of intact rocks during the failure process. The paper discusses briefly main principles of the fan-mechanism and proposes an improved model of strength profiles for hard rocks involving the fan transient strength profile. © 2016 Taylor & Francis Group, London.
    Original languageEnglish
    Title of host publicationRock Dynamics: from Research to Engineering
    Subtitle of host publicationProceedings of the 2nd International Conference on Rock Dynamics and Applications
    EditorsJian Zhao
    PublisherCRC Press
    Pages503-508
    Number of pages7
    ISBN (Electronic)978-1-315-47081-8
    ISBN (Print)978-1-138-02953-8
    DOIs
    Publication statusPublished - 2016
    Event2nd International Conference on Rock Dynamics and Applications: ROCDYN 2016 - Suzhou, China
    Duration: 18 May 201619 May 2016

    Conference

    Conference2nd International Conference on Rock Dynamics and Applications
    CountryChina
    CitySuzhou
    Period18/05/1619/05/16

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