Microseismic moment tensor based analysis of rock mass failure mechanism surrounding an underground powerhouse
Microseismic moment tensor based analysis of rock mass failure mechanism surrounding an underground powerhouse
复制标题
基于微震矩张量的地下厂房围岩破坏机制分析
DOI：
10.1080/19475705.2021.1918266
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发表时间：
2021-01
期刊：
影响因子：
--
通讯作者：
Liu Jinfei
中科院分区：
文献类型：
--
作者：
Sun Yuepeng;Li Biao;Dong Linlu;Mao Haoyu;Xu Nuwen;Zhu Zhongping;Liu Jinfei
摘要围岩破坏机理是地下工程领域的一个重要问题。为定量了解深部地下工程围岩的破坏过程和破坏机理，以后子岩水电站地下厂房为研究对象。通过分析微震(MS)事件的时空分布和现场调查确定了研究区域。在对MS信号进行去噪、P波到时提取和定位后，采用矩张量反演法确定围岩的破坏机制和破裂方向。结果表明：(1)采用矩张量分析的MS监测方法可以有效地分析围岩的破坏过程和破坏机理；(2)主厂房下游围岩的破坏类型以剪切破坏为主。该区的应力状态为走滑应力状态。(3)主变室拱顶围岩破坏类型以拉伸破坏为主。中间应力轴张应力明显，构造应力呈现近单轴压缩-双轴拉伸状态。
Abstract The failure mechanism of surrounding rock is an important issue in the field of underground engineering. To quantitatively understand the failure process and failure mechanism of the surrounding rock mass in deep underground engineering, the underground powerhouse of the Houziyan hydropower station was selected as a case study. The study area was determined by analysing the spatiotemporal distribution of microseismic (MS) events and site investigations. After noise reduction, P-wave arrival time extraction and positioning of MS signals, the moment tensor inversion method was used to determine the failure mechanism and fracture direction of the surrounding rock mass. The results showed that (1) the failure processes and mechanism of the surrounding rock mass can be effectively analysed through MS monitoring with moment tensor analysis and (2) the failure type of the surrounding rock mass downstream of the main powerhouse was characterized by shear failure. The stress state in this region was a strike-slip stress state. (3) The failure type of the surrounding rock mass at the arch roof of the main transformer chamber was characterized by tensile failure. The tensile stress of the intermediate stress axis was obvious, and the tectonic stress presented a state of near uniaxial compression-biaxial tension.
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DOI：
10.1061/(asce)0733-9399(1991)117:11(2681
发表时间：
1991-11
期刊：
Journal of Engineering Mechanics-asce
影响因子：
--
作者：
C. Ouyang;E. Landis;Surendra P. Shah
通讯作者：
C. Ouyang;E. Landis;Surendra P. Shah
DOI：
10.1007/978-1-4612-1694-0_17
发表时间：
1974-12
影响因子：
1
作者：
H. Akaike
通讯作者：
H. Akaike
影响因子：
3
作者：
R. V. Allen
通讯作者：
R. V. Allen
基于EEMD-SVD和ELM的微震信号自动识别方法
影响因子：
4.4
作者：
Zhang, Jinyong;Jiang, Ruochen;Xu, Nuwen
通讯作者：
Xu, Nuwen
DOI：
10.1016/j.ijrmms.2018.02.016
发表时间：
2018-04
影响因子：
7.2
作者：
Biao Li;Tao Li;N. Xu;F. Dai;Wenfu Chen;Yao-sheng Tan
通讯作者：
Biao Li;Tao Li;N. Xu;F. Dai;Wenfu Chen;Yao-sheng Tan