漳州台深井综合观测与洞体应变观测资料对比分析
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摘要
根据漳州地震台深井观测系统中探头上、下端面共8分量应变观测单元及台站洞体内伸缩仪的应变固体潮观测资料,利用相互垂直的一对线应变分量共5种组合的方式计算出本地的面应变,并与固体潮理论值进行两两相关分析比较。结果表明,深井观测系统的4种面应变组合的变化形态较伸缩仪面应变更接近固体潮面应变理论值,其中6#8#组合为最优组合,与固体潮理论值相关系数高达0.941 8,而伸缩仪组合与理论值相差较大,相关系数仅为0.783 8。Venedikov调和分析显示,深井观测系统的内在质量优于洞体内伸缩仪的观测质量。
According to strain tide observation data of 8-component strain meters unit in the deep bore observation system and extensometer in the cave in Zhang Zhou seismic station,we make use of a pair of line strain components which are orthogonal and have totally five assembles to calculate plane strain of Zhangzhou City and compared with the solid tidy theoretical value.The result shows that the shape change of four kinds of plain strain assemble of deep bore observation system is more close to the earth tide theoretical value than the extensometer.Among of them,the 6#8# assemble is the best and the coefficient is about 0.941 8,while the theoretical value with extensometer comparatively large,the related coefficient is 0.783 8.The Venedikov harmonic analysis shows that the inherent quality of deep bore observation system is better than observation quality of extensometer in the cave.
According to strain tide observation data of 8-component strain meters unit in the deep bore observation system and extensometer in the cave in Zhang Zhou seismic station,we make use of a pair of line strain components which are orthogonal and have totally five assembles to calculate plane strain of Zhangzhou City and compared with the solid tidy theoretical value.The result shows that the shape change of four kinds of plain strain assemble of deep bore observation system is more close to the earth tide theoretical value than the extensometer.Among of them,the 6#8# assemble is the best and the coefficient is about 0.941 8,while the theoretical value with extensometer comparatively large,the related coefficient is 0.783 8.The Venedikov harmonic analysis shows that the inherent quality of deep bore observation system is better than observation quality of extensometer in the cave.
引文
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[2]P.梅尔基奥尔.杜品仁,吴庆鹏,陈益惠,等译.行星地球的固体潮[M].北京:科学出版社,1984.
[3]中国地震局监测预报司.地壳形变数字观测技术[M].北京:地震出版社,2003.
[4]北京大学地球物理系,武汉测绘学院大地测绘系,中国科学技术大学地球物理教研室.重力与固体潮[M].北京:地震出版社,1982.
[5]方俊.固体潮[M].北京:科学出版社,1982.
[6]王敏中,王大韦,武际可.弹性力学教程[M].北京:北京大学出版社,2002.
[7]刘水莲,李祖宁,杨颍,等.福建省数字化钻孔体应变观测资料质量初步分析[J].华南地震,2007,27(4):79-87.
[8]刘序俨.应变固体潮主应变及剪应变的计算-四川姑咱台应变固体潮分析[J].地球物理学报,1994,37(增刊Ⅱ):213-221.
[9]方宏芳,张凯,张翊宁.福建省钻孔体应变同震响应分析[J].内陆地震,2010,24(3):275-280.
[10]方宏芳,刘序俨,张凯.漳州地震台伸缩仪和体应变仪同震响应分析[J].地震研究,2010,33(3):287-291.
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