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.
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.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第9期3029-3037,共9页
Chinese Journal of Geophysics
基金
国家科技支撑计划项目(2012BAK19B02-02)
地震行业科研专项(201108009)联合资助
关键词
分量式钻孔应变
双衬套模型
耦合系数
响应因子
Component borehole strain
Double bushing model
Coupling coefficient
Response factor
