| Modelling of blast-induced damage in tunnels using a hybridfinite-discrete numerical approach |
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| 作者姓名： | Amichai Mitelman Davide Elmo |
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| 作者单位： | NBK Institute of Mining Engineering,University of British Columbia,Vancouver,Canada |
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| 摘 要： | This paper presents the application of a hybrid finite-discrete element method to study blast-induceddamage in circular tunnels. An extensive database of field tests of underground explosions above tunnelsis used for calibrating and validating the proposed numerical method; the numerical results areshown to be in good agreement with published data for large-scale physical experiments. The method isthen used to investigate the influence of rock strength properties on tunnel durability to withstand blastloads. The presented analysis considers blast damage in tunnels excavated through relatively weak（sandstone） and strong （granite） rock materials. It was found that higher rock strength will increase thetunnel resistance to the load on one hand, but decrease attenuation on the other hand. Thus, undercertain conditions, results for weak and strong rock masses are similar. 2014 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting byElsevier B.V. All rights reserved.
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| 关 键 词： | Blast damage Tunnels Numerical analysis Finite-discrete method |
| 收稿时间： | 21 August 2014 |
Modelling of blast-induced damage in tunnels using a hybrid finite-discrete numerical approach |
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| Amichai Mitelman Davide Elmo.Modelling of blast-induced damage in tunnels using a hybridfinite-discrete numerical approach[J].Journal of Rock Mechanics and Geotechnical Engineering,2014,6(6):565-573. |
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| Authors: | Amichai Mitelman Davide Elmo |
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| Abstract: | This paper presents the application of a hybrid finite-discrete element method to study blast-induced damage in circular tunnels. An extensive database of field tests of underground explosions above tunnels is used for calibrating and validating the proposed numerical method; the numerical results are shown to be in good agreement with published data for large-scale physical experiments. The method is then used to investigate the influence of rock strength properties on tunnel durability to withstand blast loads. The presented analysis considers blast damage in tunnels excavated through relatively weak(sandstone) and strong(granite) rock materials. It was found that higher rock strength will increase the tunnel resistance to the load on one hand, but decrease attenuation on the other hand. Thus, under certain conditions, results for weak and strong rock masses are similar. |
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| Keywords: | Blast damage Tunnels Numerical analysis Finite-discrete method |
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