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钻孔耦合对体应变观测的影响分析
Effect of coupling on the borehole body strain observation
- DOI:
- 作者:
- 田 韬 王俊菲 王 维 郝永亮
Tian Tao ,Wang Junfei ,Wang Wei ,Hao Yongliang
- 作者单位:
- 中国南京210014江苏省地震局
China, Nanjing 210014,Earthquake Administration of Jiangsu Province
- 关键词:
- 体应变；厚壁筒；固体潮；标定；耦合
borehole body strain， thick wall cylinder， earth tide， calibration， coupling.
- 摘要:
- 利用三层厚壁筒组合模型，给出不同类型体应变的相互转换关系, 分析模型参数变化对3类体应变仪观测的影响。通过对全国60多个台站的体应变观测资料分析，发现钻孔的气压系数与潮汐因子无简单对应关系。利用固体潮标定不同台站的体应变到统一系统的体应变，结果表明，多数台站存在体应变潮汐因子观测值比理论值明显偏小现象，推测可能与钻孔存在非完全耦合有关。
In this paper, based on the combined model of three thick wall cylinders, gived the mutual conversion formula between different types of borehole body strain, analyzed the effect of model parameters on three types of borehole body strain observation. Through analysis of the body strain data on more than 60 stations, found no simple correspondence between barometric coefficient and tidal factor on the same station. By earth tide, calibrated the body strain of different boreholes into the unified system strain, the results indicated that many body strain tidal factor observation were significantly smaller than the theoretical value. Therefore, that may be related to borehole incompletely coupled.
