Numerical Prediction of Rock Fracturing During the Process of Excavation

Zhangtao Zhou, Zheming Zhu, XinXing Jin and Hao Tang
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Zhangtao Zhou: Sichuan University, China
Zheming Zhu: Sichuan University, China
XinXing Jin: Sichuan University, China
Hao Tang: Sichuan University, China

International Journal of Geotechnical Earthquake Engineering (IJGEE), 2010, vol. 1, issue 2, 12-23

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.

Date: 2010
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