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现代隧道技术 2017, Vol. 54 Issue (3) :26-31    DOI:
研究与探讨 最新目录 | 下期目录 | 过刊浏览 | 高级检索 << Previous Articles | Next Articles >>
深埋长大隧道层状围岩岩爆特征研究
(1成都地铁有限责任公司, 成都 610031; 2西南交通大学, 成都 610031)
Study of Rockburst Characteristics of Bedded Surrounding Rock in Deep and Long Tunnels
(1 Chengdu Metro Co. Ltd., Chengdu 610031; 2 Southwest Jiaotong University, Chengdu 610031)
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摘要  文章以二郎山深埋长大隧道为工程依托, 利用 3DEC软件建立层状围岩不同倾角、 倾向与层厚的数值模型, 计算隧道洞壁各位置的主应力, 以此判断隧道施工过程中岩爆发生的位置。结果表明: 围岩倾角为 0°或层状岩倾向与隧道掘进方向相同时, 拱顶位置主应力最大; 围岩倾角 90°时, 两侧边墙易发生岩爆; 层状岩倾向与隧道掘进方向相反时, 掌子面上半部分主应力最大, 为岩爆易发位置; 层厚不影响隧道洞周主应力最大值的位置。
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Abstract: Based on the long and deep Erlang Mountain tunnel , 3DEC software was used to build a numerical mod? el with different dip angles, inclinations and thicknesses of the bedded surrounding rock, and the principal stress of each position at the tunnel periphery was calculated so as to judge the rockburst position during tunnel construction.The results show that: 1) when the dip angle of the surrounding rock is 0° or the inclination of the stratified rock is the same as the tunnelling direction, the principle stress at the vault crown position is the largest; 2) when the rock dip angle is 90°, the two side walls are prone to rockburst; 3) when the rock inclination is opposite to that of the tunnel excavation, the principal stress at the upper part of the working face is the largest, where it is prone to rockburst; and 4) the thickness of the bedded rock does not affect the position of the maximum principal stress.
KeywordsDeep and long tunnels,   Rockburst characteristics,   Dip angle of bedded rocks,   Inclination of bedded rocks,   Thickness of bedded rocks     
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作者简介: 作者简介: 时亚昕(1973-),博士,工程师,主要从事地下工程科研及施工管理工作, E-mail: 55150203@qq.com.
引用本文:   
.深埋长大隧道层状围岩岩爆特征研究[J]  现代隧道技术, 2017,V54(3): 26-31
.Study of Rockburst Characteristics of Bedded Surrounding Rock in Deep and Long Tunnels[J]  , 2017,V54(3): 26-31
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