钻孔应变的干扰源及其干扰机制的多方法分析  

The Multi-Method Analysis of Interference Source and Interference Mechanism of Borehole Strain

作　　者：苏维刚 马茹莹[2] 马震[2] 孙玺皓[2] SU Weigang;MA Ruying;MA Zhen;SUN Xihao(Qinghai Institute of Salt Lakes,CAS,18 Xinning Road,Xining 810008,China;Qinghai Earthquake Agency,1 Xinghai Road,Xining 810001,China)

机构地区：[1]中国科学院青海盐湖研究所,西宁市810008 [2]青海省地震局,西宁市810001

出　　处：《大地测量与地球动力学》2021年第8期871-876,共6页Journal of Geodesy and Geodynamics

基　　金：中国地震局“三结合”课题(3JH-202001092);中国地震局震情跟踪定向工作任务(2020010302)。

摘　　要：德令哈台YRY-4钻孔应变观测数据长期受环境干扰影响。本文基于多种方法,通过分析观测资料与气象因素的相关性及环境水体蓄放水的载荷影响,追溯不同水体的地球化学特征,判断钻孔应变所受干扰来源及干扰机制。研究表明,在长时间尺度上,德令哈台钻孔应变存在稳定、显著的年周期性气温、气压干扰和不稳定、细微的地下水渗漏扰动;在短时间尺度上,德令哈台钻孔应变每年4~11月前后受人工湖和水库蓄放水影响,存在载荷效应。The observation data of Delhi YRY-4 have been affected by environmental interference for a long time.Based on various methods,this study judges and analyzes the interference source and mechanism of borehole strain by analyzing the relativity between observation data and meteorological factors,the load influence of environmental water storage and release,and the geochemical characteristics of different water bodies.The results show that there are stable and significant annual periodic air temperature and pressure disturbances,unstable and subtle groundwater leakage disturbances on a long time scale.In a short time scale,there exists load interference of water storage and release in artificial lakes and reservoirs,which last from April to November every year.

关 键 词：钻孔应变 干扰源 相关性 载荷效应 地球化学特征 

分 类 号：P315[天文地球—地震学]