| 锦屏二级水电站TBM施工中的岩爆问题分析及对策 |
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| 引用本文： | 罗志虎,杨鹏飞.锦屏二级水电站TBM施工中的岩爆问题分析及对策[J].岩土工程技术,2009,23(1):52-54,F0003. |
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| 作者姓名： | 罗志虎 杨鹏飞 |
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| 作者单位： | 中国水电顾问集团北京勘测设计研究院,北京,100024 |
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| 摘 要： | 锦屏二级水电站施工排水洞在施工前的101d内，仅掘进1027m。这期间共发生3次岩爆，直接影响到掘进的进程。按照岩爆发生的时间顺序，依次描述这3次岩爆的危害程度，影响范围。岩爆的发生具有一定的规律性，不仅与高地应力有关，而且与岩体的结构特征、赋水条件等有一定的关系。同时，TBM施工的特点也是加剧岩爆发生的因素之一。最后，通过对岩爆发生规律的分析，提出了相应的对策。
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| 关 键 词： | TBM施工 岩爆 防治对策 |
Rock-burst and Its Countermeasure of TBM Construction in Drainage Tunnel of a Hydropower station |
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| Luo Zhihu,Yang Pengfei.Rock-burst and Its Countermeasure of TBM Construction in Drainage Tunnel of a Hydropower station[J].Geotechnical Engineering Technique,2009,23(1):52-54,F0003. |
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| Authors: | Luo Zhihu Yang Pengfei |
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| Institution: | Luo Zhihu Yang Pengfei (Beijing Hydropower Investigation Design Research Institute, CHECC, Beijing 100024, China) |
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| Abstract: | It had only been tunneled 1 027 m in previous 101 d in construction drainage tunnel of the Jinping Second cascade hydropower state. It had occurred 3 times rock-burst altogether in this period which immediately influence the tunneling process. The harm degree and the influence area of these rock-burst according to the time sequence which rock-burst occurred are discribed. The occurrence of rock-burst has certain regularity, which is not only related to high in-situ stress,but also related to the structural features of rock mass and the water conditions,etc. Simultaneity, the construction characteristic of TBM is also one of the factors which intensifying the occurrence of rock-burst. Utimately,it proposes the corresponding countermeasures by analysis for the occurrence regularity of rock-burst. |
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| Keywords: | TBM construction rock-burst prevention countermeasures |
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