汶川8.0级地震近场流体的同震响应与震后效应机理的数值模拟研究

地震 ›› 2012, Vol. 32 ›› Issue (1): 49-58.

汶川8.0级地震近场流体的同震响应与震后效应机理的数值模拟研究

司学芸¹, 邵志刚², 周龙泉³, 张浪平², 晏锐³

1.宁夏回族自治区地震局, 宁夏银川 750001;
2.中国地震局地震预测研究所, 北京 100036;
3.中国地震台网中心, 北京 100045

收稿日期:2011-04-26 修回日期:2011-09-16 出版日期:2012-01-31 发布日期:2021-08-20
作者简介:司学芸(1977-), 女, 宁夏银川人, 工程师, 主要从事地震地下流体分析预报等研究。
基金资助:
2010年度中国地震局震情跟踪合同制任务(2010020801)资助

Numerical Simulation of Near-field Fluid Coseismic Response and Post-seismic Effects of the Wenchuan 8.0 Earthquake

SI Xue-yun¹, SHAO Zhi-gang², ZHOU Long-quan³, ZHANG Lang-ping², YAN Rui³

1. Earthquake Administration of Ningxia Hui Autonormous Region, Yinchuan 750001, China;
2. institute of Earthquake science, CEA, Beijing 100036, China;
3. China Earthquake Network Centers, CENC, Beijing 100045, China

Received:2011-04-26 Revised:2011-09-16 Online:2012-01-31 Published:2021-08-20

摘要/Abstract

摘要： 2008年汶川8.0级地震引起大范围流体观测同震和震后显著响应, 本文通过对流体观测数据进行分析, 确定了此次地震显著近场流体观测变化的台站。基于汶川8.0级地震永久形变引起的孔隙压力变化理论计算, 讨论近场流体观测同震和震后变化的物理机制。为探讨强震引起的同震和震后流体影响空间特征, 分别计算了不同机制类型不同震级所对应的流体响应, 以期确定流体近场效应的空间特征, 为强震同震和震后流体观测机理分析提供了有意义的参考。

关键词: 近场流体观测, 孔隙压力, 力学机制, 汶川8.0级地震

Abstract: The 2008 Wenchuan M8.0 earthquake caused a wide range of notable co-seismic and post-earthquake responses in fluid observation. We find the stations with notable change of near-field fluid observation by analysis of the data. Based on theoretical calculations of pore pressure changes caused by perpetual deformation with the earthquake, we discuss the physical mechanism of notable coseismic and post-earthquake changes in fluid observation. Then, in order to investigate the special characteristics of fluid effects caused by strong earthquakes, we separately calculate fluid response with different faulting styles and different magnitudes. It is expected that calculated near-field fluid effects can provide meaningful reference for mechanism analysis of fluid observation.

Key words: The 2008 Wenchuan M8.0 earthquake, Near-field fluid observation, Pore pressure, Physical mechanism

中图分类号:

P315.7

司学芸, 邵志刚, 周龙泉, 张浪平, 晏锐. 汶川8.0级地震近场流体的同震响应与震后效应机理的数值模拟研究[J]. 地震, 2012, 32(1): 49-58.

SI Xue-yun, SHAO Zhi-gang, ZHOU Long-quan, ZHANG Lang-ping, YAN Rui. Numerical Simulation of Near-field Fluid Coseismic Response and Post-seismic Effects of the Wenchuan 8.0 Earthquake[J]. EARTHQUAKE, 2012, 32(1): 49-58.

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