锦屏二级水电站引水隧洞TBM开挖方案对岩爆风险影响研究

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Abstract To improve efficiency of construction and reduce the risk of site construction personnel and equipment，the 1#，3# diversion tunnel of Jinping II hydropower station adopt large-section TBM for construction. The full-section TBM construction under large buried depth，when encounter strong grade rock burst，it still may bring some damage to TBM equipment. Therefore，through the real time microseismic monitoring and numerical analysis，study the influence of TBM excavation scheme、heading construction on the risk of rock burst. The results show that，lowering the rate of construction，can reduce the risk of rock burst；pilot excavation and TBM joint construction is advantageous to prevent strong grade rock burst. The research results can provide important reference value for the safe and rapid excavation of TBM，will also provide reference for other similar project，it has an important engineering value.

Key words： deep buried long tunnel TBM excavation scheme rock burst evolution

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http://www.rockmech.org/EN/Y2015/V34/I04/728

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