忻州地区YRY-4钻孔应变台阵干扰特征分析  

Interference Characteristics Analysis of YRY-4 Borehole Strain Array in Xinzhou Area

作　　者：高龙飞 李梦莹[3] 闫美蓉[1,2] 白伟利 GAO Longfei;LI Mengying;YAN Meirong;BAI Weili(Shanxi Earthquake Agency,Shanxi Taiyuan 030021,China;National Field Scientific Observation and Research Station of Taiyuan Continental Rift Dynamics,Shanxi Taiyuan 030025,China;Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)

机构地区：[1]山西省地震局,山西太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025 [3]辽宁省地震局,辽宁沈阳110034

出　　处：《防灾减灾学报》2024年第4期30-35,41,共7页Journal of Disaster Prevention And Reduction

基　　金：山西省地震局科研项目(SBK-2010)。

摘　　要：分量钻孔应变在地震台站日常观测中常受外界及仪器自身干扰,导致观测曲线异常。基于繁峙西砂河、代县、宁武、原平地震观测站的4套YRY-4钻孔应变仪的观测数据,从气象、观测系统、人为干扰三方面进行了深入分析。研究发现:观测系统干扰对分量应变曲线影响显著,主要体现为断记并伴随重启产生的突跳;气象与观测环境干扰则多导致固体潮畸变其形态不易直接判别,需要结合降雨、气压数据及现场调查进行综合判别。总结各种干扰特征,可为台站人员数据预处理工作提供高效的数据变化判断依据,有助于提高数据分析质量。During the routine observations at seismic stations,the component borehole strain is frequently interfered by external factors and the instruments themselves,leading to abnormal observation curves.Based on the observational data of four sets of YRY-4 borehole strainmeters from the Fanshi Xishahe,Daixian,Ningwu and Yuanping seismic observation stations,an in-depth analysis was conducted from three aspects:meteorology,observation system and human interference.The study found that the interference of the observation system has a significant impact on the component strain curves,mainly manifested as sudden jumps caused by breaks in recording accompanied by restarts.The interferences from meteorology and the observation environment mostly result in the distortion of solid tides,and their forms are not easy to directly distinguish,requiring comprehensive discrimination by combining rainfall,air pressure data and on-site investigations.Summarizing the characteristics of various interferences can provide an efficient basis for station personnel to judge data changes in the data preprocessing work,which is helpful for improving the quality of data analysis.

关 键 词：分量钻孔应变 干扰因素 荷载力 气压影响系数 干扰特征 

分 类 号：P315.72[天文地球—地震学]