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The Effects of Three-Dimensional Penny-Shaped Cracks on Zonal Disintegration of the Surrounding Rock Masses Around a Deep Circular Tunnel

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Abstract

In this study, it was assumed that three-dimensional penny-shaped cracks existed in deep rock masses. A new non-Euclidean model was established, in which the effects of penny-shaped cracks and axial in-situ stress on zonal disintegration of deep rock masses were taken into account. Based on the non-Euclidean model, the stress intensity factors at tips of the penny-shaped cracks were determined. The strain energy density factor was applied to investigate the occurrence of fractured zones. It was observed from the numerical results that the magnitude and location of fractured zones were sensitive to micro- and macro-mechanical parameters, as well as the value of in-situ stress. The numerical results were in good agreement with the experimental data.

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Authors and Affiliations

  1. School of Civil Engineering, Chongqing University, 400045, Chongqing, China

    Xiaoping Zhou & Hanfei Song

  2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, 400045, Chongqing, China

    Xiaoping Zhou & Hanfei Song

  3. Engineering Institute of National Defense Engineering, PLA University of Science and Technology, 210007, Nanjing, China

    Qihu Qian

  4. State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology, 210007, Nanjing, China

    Qihu Qian

Authors
  1. Xiaoping Zhou
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  2. Qihu Qian
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  3. Hanfei Song
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Correspondence to Qihu Qian.

Additional information

This work was supported by the 973 Project (No. 2014CB046903), the National Natural Science Foundation of China (Nos. 51325903 and 51279218), the Natural Science Foundation Project of CQ CSTC (Nos. CSTC2013KJRC1JRCCJ30001 and CSTC2013JCYJYS0005).

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Zhou, X., Qian, Q. & Song, H. The Effects of Three-Dimensional Penny-Shaped Cracks on Zonal Disintegration of the Surrounding Rock Masses Around a Deep Circular Tunnel. Acta Mech. Solida Sin. 28, 722–734 (2015). https://doi.org/10.1016/S0894-9166(16)30012-X

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  • DOI: https://doi.org/10.1016/S0894-9166(16)30012-X

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