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 language | English |
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| Title of host publication | Rock Dynamics: from Research to Engineering |
| Subtitle of host publication | Proceedings of the 2nd International Conference on Rock Dynamics and Applications |
| Editors | Haibo Li, Jianchun Li, Qianbing Zhang, Jian Zhao |
| Publisher | CRC Press |
| Pages | 503-508 |
| Number of pages | 6 |
| ISBN (Electronic) | 978-1-315-47081-8 |
| ISBN (Print) | 978-1-138-02953-8 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | 2nd International Conference on Rock Dynamics and Applications: ROCDYN 2016 - Suzhou, China Duration: 18 May 2016 → 19 May 2016 |
Conference
| Conference | 2nd International Conference on Rock Dynamics and Applications |
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| Country/Territory | China |
| City | Suzhou |
| Period | 18/05/16 → 19/05/16 |
