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It is widely known that blasting and TBM are the general methods for the deep rock mass excavation, and can respectively induce transient release of in-situ stress (TRIS) and quasi-static unloading of in-situ stress (QSUIS) on the excavation boundary. As one of the most important triggers, the unloading of in-situ stress caused by excavation frequently induces strainbursts. However, little attention...
The buried depths of the auxiliary tunnels of the Jin-ping II Hydropower Station in China are between 1500m and 2300m, and some violent rock bursts were encountered during the excavation process. The measures of rock burst prevention adopted at this station are summarized in this paper, and the mechanisms of these measures are studied and discussed. Combined with the monitoring of the in-situ stress...
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