| 分量式钻孔应变仪监测的附加应变场面应变分析 |
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| 引用本文： | 钟继茂.分量式钻孔应变仪监测的附加应变场面应变分析[J].地震地磁观测与研究,2012,33(5):212-216. |
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| 作者姓名： | 钟继茂 |
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| 作者单位： | 中国福州350003,福建省地震局 |
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| 基金项目： | 福建省地震局科研项目基金 |
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| 摘 要： | 根据钻孔加衬模型和应变理论,得出分量式钻孔应变仪观测值不等于实际的线应变,但相互垂直的应变元件观测值之和与面应变成正比例.利用四分量钻孔应变仪的“自检”功能,对观测数据进行校正.以漳州地震台分量式钻孔应变仪资料为例,计算校正系数.校正前后的残差分析结果表明,校正效果明显.
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| 关 键 词： | 分量式钻孔应变仪 漳州观测井 附加应变场 面应变 校正 |
Analysis on the plane strain of the additional strain field monitored by component-type borehole strain meter |
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| Zhong Jimao.Analysis on the plane strain of the additional strain field monitored by component-type borehole strain meter[J].Seismological and Geomagnetic Observation and Research,2012,33(5):212-216. |
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| Authors: | Zhong Jimao |
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| Institution: | Zhong Jimao (Earthquake Administration of Fujian Province, Fuzhou 350003, China) |
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| Abstract: | According to the lined borehole model and strain theory, we derived that observation value of component-type borehole strain meter is not equal to actual line strain, but sum of observation values of strain sensors laid vertically each other is proportional to the plane strain. The observation data is decomposed into long trend part and part of high frequency tide. Accordingly, the dynamic strain field can be decomposed into a relatively stable background strain field and a real-time changing additional strain field. We make correction for observation data using the ＂self test＂ function of 4-component borehole strain meter. The correction coefficients are calculated with data of component-type borehole strain meter at Zhangzhou Seismic Station. Residual analysis before and after correction shows the effect is obvious. |
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| Keywords: | component-type borehole strain meter Zhangzhou observation well additional strain field plane strain correction |
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