锦屏二级水电站TBM施工中的岩爆问题分析及对策
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。
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.
中文标题：
锦屏二级水电站TBM施工中的岩爆问题分析及对策
Rock-burst and Its Countermeasure of TBM Construction in Drainage Tunnel of a Hydropower station
作者：
罗志虎,杨鹏飞
Luo Zhihu,Yang Pengfei
作者简介:罗志虎,1980年生,男,河南信阳人,助理工程师,工学学士。E-mail:ahul515@163.com
通讯地址：
中国水电顾问集团北京勘测设计研究院, 北京 100024
BeijingHydropowerInvestigationDesignResearchInstitute,CHECC,Beijing100024,China
中图分类号:TU457
出版物：岩土工程技术
收稿日期:2008-12-04
关键词:TBM施工,岩爆,防治对策
Key words:TBM construction,rock-burst,prevention countermeasures
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