| 地震前兆时空非均匀性指标Cv值的实验检验 |
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| 引用本文： | 王凯英,马胜利,刘力强,马瑾.地震前兆时空非均匀性指标Cv值的实验检验[J].地震学报,2002,24(1):82-89. |
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| 作者姓名： | 王凯英 马胜利 刘力强 马瑾 |
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| 作者单位： | 1）中国北京100029中国地震局地质研究所
2）中国北京100029中国地震局构造物理开放实验室 |
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| 基金项目： | 地震科学联合基金 ( 95 0 74 35 )资助 |
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| 摘 要： | 在双向加载条件下，对两种构造和介质不同的岩石标本进行变形实验，测量了标本表面不同部位的应变．在此基础上，利用王晓青和陈学忠等提出的描述地震前兆非均匀分布的参量————Cv值，分析了标本变形失稳过程中应变异常的分布，以期从实验角度检验Cv值方法并探讨其物理意义．研究表明，Cv值的变化与岩石变形特征的变化有关，是描述前兆分布非均匀性的一种有效指标；Cv值在失稳发生前先异常上升，然后下降，并在Cv值恢复过程中或恢复后伴随着失稳事件的发生．因此，Cv值是一种有效的预报指标．
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| 关 键 词： | 岩石力学实验 应变场 地震前兆 非均匀性 |
| 文章编号： | 0253-3782(2002)01-0082-08 |
| 修稿时间： | 2001年1月31日 |
EXPERIMENTAL EXAMINATION ON THE HETEROG-ENEITY PARAMETER Cv OF DISTRIBUTION OF EARTHQUAKE PRECURSORS |
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| Wang Kaiying , Ma Shengli , Liu Liqiang , Ma Jin , Institute of Geology,China Seismological Bureau,Beijing ,China Laboratory of Tectonophysics,China Seismological Bureau,Beijing ,China.EXPERIMENTAL EXAMINATION ON THE HETEROG-ENEITY PARAMETER Cv OF DISTRIBUTION OF EARTHQUAKE PRECURSORS[J].Acta Seismologica Sinica,2002,24(1):82-89. |
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| Authors: | Wang Kaiying Ma Shengli Liu Liqiang Ma Jin Institute of Geology China Seismological Bureau Beijing China Laboratory of Tectonophysics China Seismological Bureau Beijing China |
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| Institution: | Wang Kaiying 1,2) Ma Shengli 1,2) Liu Liqiang 1,2) Ma Jin 1,2) 1) Institute of Geology,China Seismological Bureau,Beijing 100029,China 2) Laboratory of Tectonophysics,China Seismological Bureau,Beijing 100029,China |
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| Abstract: | Two rock samples with different structure and materials were deformed under a biaxial loading system, and multipoint strain measurements were performed for each sample. The distribution of strain anomalies during the deformation and the instability process was analyzed by using C v value put forward by Wang Xiaoqing and Chen Xuezhong, et al , a parameter to describe the heterogeneous distribution of earthquake precursors, to examine the method of C v value and to explore its physical meaning experimentally. The result shows that the change of C v value is correlated to the change of deformation characteristics and is an effective parameter to describe the heterogeneity of precursor distribution. C v value increases firstly and then decreases before the instability, and the instability occurs when C v value decreases to the level before increasing. This indicates that C v value may be a useful parameter for earthquake prediction. |
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| Keywords: | rock mechanical experiment strain field earthquake precursor heterogeneity |
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