DETERMINATION OF DIRECTION OF ADDITIONAL STRAIN FIELD IN OBSERVATION AREA FROM DATA OF MULTI-COMPONENT BOREHOLE STRAINMETER
用多分量钻孔应变仪资料推算测区附加应变场方向

Taking the observation data of Zhangzhou station,Fujian as an example,we determined direction of the additional strain field in observation area from data of multi-component borehole strain-meter.According to the characteristics of observation data,the dynamic strain field can be decomposed into the background strain field and the additional strain field.In order to study the variation characteristics of principal strain directions of the additional strain field,we used the formula of lined borehole model t...