基于钻孔特性的体应变观测相关性研究
Study on Correlation of Volume Strain Observation Based on Borehole Features

采用相关分析与调和分析方法对江苏省数字化以来的体应变观测数据进行计算，研究不同台站观测资料变化特征。结合钻孔柱状图和仪器运行状况，分析了M2波潮汐因子、气压和水位回归系数与岩性和井孔特性的关系，讨论在安装过程中提高体应变仪观测质量的有效措施。
Fifteen volume strain observation points were established in Jiangsu province during the construction of the Jiangsu digital seismic precursor network. However, the stability of observation data obtained from these points is influenced by differing installation times, geographical positions, geological conditions, and drilling features. Regression and harmonic analyses have been used in this study to discuss the observed data of volume strain in Jiangsu province; further, the variation characteristics of observed data obtained from different stations have also been analyzed. In combination with borehole histogram and the running status of instruments, the relation among the tidal factor of the M2 wave, regression coefficients of pressure and water level, lithology, and borehole features are analyzed. In addition, effective measures that can improve the quality of volume strain observation are discussed.