摘要
应用相关分析与谱分析方法,研究了天津宝坻、北京东三旗和河北张家口台2003～2006年钻孔体应变与气压之间的关系。分析结果表明,同一台站不同周期的气压波与体应变具有不尽相同的关系,如宝坻台年周期体应变与气压负相关,回归系数为-13.35×10-11/Pa,滞后气压变化62.15天;月周期和日、半日周期体应变与气压均呈同步、线性、正相关关系,回归系数平均值分别为7.489×10-11/Pa和6.301×10-11/Pa。不同台站日、半日周期和月周期气压波对体应变的影响较为接近,而与年周期相比差异较大。根据岩石力学和弹性力学原理,进一步探讨了不同周期气压波与体应变相关性存在差异的原因。
The paper studies the relations between borehole volumetric strain and atmospheric pressure in 2003 - 2006 at the Baodi Station in Tianjin, Dongsanqi Station in Beijing and the Zhangjiakou Station in Hebei by correlation analysis and spectrum analysis. The result shows that there are different relations between atmospheric pressure wave and volumetric strain at different period. For example, it is negatively correlated between annual volumetric strain and atmospheric pressure at the Bodi Station. Their regression coefficient is - 13.35 - 10-U/Pa. Volumetric strain logs atmospheric pressure 62.15 days. They are synchronization, linearity and positive correlation between volumetric strain and atmospheric pressure in month period or daily and half daily period. Their average regression coefficient value is 7.489 - 10^-11/Pa and 6.301 × 1^-11/Pa respectively. This result shows that atmospheric pressure wave influenced volumetric strain at different stations on the basis of month period or daily and half daily and the difference is the greatest annually. The paper also explores the reasons for the difference in the correlation between atmospheric pressure wave and volumetric strain at different periods.
出处
《中国地震》
CSCD
北大核心
2008年第4期415-421,共7页
Earthquake Research in China
基金
"十一五"国家科技支撑计划重点项目(2006BAC01B02-02-01)
关键词
体应变
气压
周期
谱分析
回归分析
Volumetric strain Atmospheric pressure Regression analysis Period Spectrum analysis
