Modelling of blast-induced damage in tunnels using a hybrid finite-discrete numerical approach

查看全文 作　　者：Amichai [1]Mitelman;Davide [1]Elmo

机构地区：[1]NBK Institute of Mining Engineering, University of British Columbia,Vancouver, Canada

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》索引2014年第6卷第6期,共9页

摘　　要：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. 关键词：BLAST DAMAGE TUNNELS NUMERICAL analysis Finite-discrete method

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Modelling of blast-induced damage in tunnels using a hybrid finite-discrete numerical approach

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