| 武都四分量钻孔应变观测数据分析 |
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| 引用本文： | 蒲小武,王康,梅东林,陈彦平.武都四分量钻孔应变观测数据分析[J].地震地磁观测与研究,2013(5):328-333. |
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| 作者姓名： | 蒲小武 王康 梅东林 陈彦平 |
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| 作者单位： | 陇南中心地震台,中国甘肃746000 |
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| 基金项目： | 国家自然科学基金（41174059） |
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| 摘 要： | 通过对多年水位、应变观测数据分析发现,水位上升引起应变下降变化（压应力增加）,两者变化同步.在水位大幅度变化时段求取应变响应灵敏度系数K,由K值可以定量剔除水位变化对应变测值的干扰.利用两两正交的4道应变测值可以求取2组面应变值,曲线形态相似则说明4道元件测值可靠性高.武都钻孔应变2组面应变值变化趋势基本相同,总体呈现波动下降（压性）变化.由2007年、2008年应变测值计算差异值η,其绝对值的平均值为0.21,数值较小,说明武都应变仪工作稳定,所测数据基本可靠.
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| 关 键 词： | 钻孔应变 水位干扰剔除 面应变 可靠性 |
Wudu 4-component borehole strain level interference factors to eliminate and reliability analysis |
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| Pu XiaowuWudu Seismic Station,Gansu Province,China Wang KangWudu Seismic Station,Gansu Province,China Mei DonglinWudu Seismic Station,Gansu Province,China Chen Yanping.Wudu 4-component borehole strain level interference factors to eliminate and reliability analysis[J].Seismological and Geomagnetic Observation and Research,2013(5):328-333. |
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| Authors: | Pu XiaowuWudu Seismic Station Gansu Province China Wang KangWudu Seismic Station Gansu Province China Mei DonglinWudu Seismic Station Gansu Province China Chen Yanping |
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| Institution: | Pu Xiaowu(Wudu Seismic Station, Gansu Province 746000, China) Wang Kang(Wudu Seismic Station, Gansu Province 746000, China) Mei Donglin(Wudu Seismic Station, Gansu Province 746000, China) Chen Yanping(Wudu Seismic Station, Gansu Province 746000, China) |
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| Abstract: | Based on years of water level and strain observation data analysis found that water level rise immediately can cause strain down changes （pressure stress increase）,and the change is synchronized.In the water level change time greatly to calculate the strain response sensitivity coefficient K,the K value can be quantitative to eliminate water level changes of strain measurement value of the interference.Using two orthogonal four word element strain measurement value can calculate the two groups of plane strain value,surface strain value curve form similar,explain the four word element measurement value of the high reliability.Wu are boring strain two groups of plane strain value trend is basic and same,overall present fluctuation decrease （compressional）change.By 2007,2008 strain measurement value difference value η,the absolute value of the average value is 0.21,η value smaller that wu are strain gauge stable work,reliable basic data measured. |
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| Keywords: | borehole strain water level interference to eliminate surface strain reliability |
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