| 分量式钻孔应变观测耦合系数的计算 |
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| 引用本文： | 张凌空,牛安福.分量式钻孔应变观测耦合系数的计算[J].地球物理学报,2013,56(9):3029-3037. |
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| 作者姓名： | 张凌空 牛安福 |
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| 作者单位： | 中国地震台网中心, 北京 100045 |
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| 基金项目： | 国家科技支撑计划项目，地震行业科研专项 |
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| 摘 要： | 根据双衬套钻孔应变观测力学模型,推导出平面应力作用下各分量应变观测中两个耦合系数(A、B)的计算公式,为进一步确定地壳应变场最大、最小主应变的数值及方向提供了必需的前提条件,对当前国内外开展的利用钻孔应变进行地震、火山和板块边界的观测研究具有一定积极意义.研究结果表明,A、B与用双环模型和复变函数法解算出的c(面应变响应因子)、d(剪应变响应因子)之间分别存在2倍的关系(c=2A,d=2B),并且二者绘制的曲线完全一致,c、d的物理含义分别是地壳岩石面应变与剪应变观测的井孔耦合系数.
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| 关 键 词： | 分量式钻孔应变 双衬套模型 耦合系数 响应因子 |
| 收稿时间： | 2012-09-13 |
Component borehole strain observations coupling coefficients calculation |
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| ZHANG Ling-Kong
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NIU An-Fu.Component borehole strain observations coupling coefficients calculation[J].Chinese Journal of Geophysics,2013,56(9):3029-3037. |
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| Authors: | ZHANG Ling-Kong NIU An-Fu |
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| Institution: | China Earthquake Networks Center, Beijing 100045, China |
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| Abstract: | Based on the double bushing borehole strain observation mechanical model, we deduced the calculation formulae of two coupling coefficients(A,B)of each strain component under plane stress. This provides a basis for further determining the value and direction of maximum and minimum principal strain of the crustal strain field, and has a positive meaning for carrying out borehole strain observation of earthquakes, volcanoes and plate boundaries. Using a two-ring model and the complex variable function method to calculate the c (area strain response coefficient) and d (shear strain response factor), A and c, B and d have a relationship as c=2A,d=2B. And the variation curves are identical. Their physical meanings are respectively the crust rock area strain and shear strain observation borehole coupling coefficient. |
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| Keywords: | Component borehole strain Double bushing model Coupling coefficient Response factor |
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