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Numerical Prediction of Rock Fracturing During the Process of Excavation

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  • Zhangtao Zhou

    (Sichuan University, China)

  • Zheming Zhu

    (Sichuan University, China)

  • XinXing Jin

    (Sichuan University, China)

  • Hao Tang

    (Sichuan University, China)

Abstract

During the process of excavation, blasting can induce cracking inside the surrounding rock. Considering the effects of material properties and loading conditions, a rock blasting excavation model with two successive excavation steps was developed through the use of AUTODYN code. Four kinds of equation of state (EOS), linear, shock, JWL, and compaction were applied to the materials employed in this numerical model. A modified principal stress failure criterion was applied to determining material statuses, and TNT explosive and a relatively homogeneous igneous rock, diorite, were used in this numerical model. By using this numerical model, rock fracturing process during blasting excavation was simulated, and rock fracturing process during two successive excavations is presented.

Suggested Citation

  • Zhangtao Zhou & Zheming Zhu & XinXing Jin & Hao Tang, 2010. "Numerical Prediction of Rock Fracturing During the Process of Excavation," International Journal of Geotechnical Earthquake Engineering (IJGEE), IGI Global, vol. 1(2), pages 12-23, July.
    • Handle: RePEc:igg:jgee00:v:1:y:2010:i:2:p:12-23
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