锦屏二级深埋隧洞构造型岩爆诱发机制与案例解析

doi:10.13722/j.cnki.jrme.2015.0626

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Abstract The total length of Jinping II deep buried tunnel cross different geological units is more than 16 km. In the process of excavation，rockburst was controlled by the geological structure conditions and the local stress field. The tectonic rockburst is directly affected by the geological tectonics. Based on the systematic analysis of the forefront research results about rockburst in deep engineering home and abroad，and combined with the rockburst revealed by a large number of cases in Jinping II deep buried tunnel engineering，the tectonic rockbursts were further subdivided into end tectonic，slip tectonic and strain tectonic. The inverse analysis of the rockburst was carried out with the discrete element program and related risk evaluation index of rockburst. The mechanism of different kinds of tectonic rockburst in deep buried tunnel engineering was revealed，and the key controlling factors of rockburst and control mechanisms of various factors were analyzed. Finally，the corresponding control schemes were put forward according to the different types of tectonic rockburst.

Key words： tunnelling engineering Jinping II deep buried tunnel tectonic rockburst inducement mechanism

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.0626 OR http://www.rockmech.org/EN/Y2015/V34/I11/2242

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