埋地金属管道影响视电阻率观测的数值模拟  

Digital analogue of apparent resistivity where there is a metal pipe line buried

作　　者：胡德军[1] 徐建明[1] 张建民[1] 鞠岷 

机构地区：[1]四川省地震局西昌地震中心站,四川西昌615022

出　　处：《四川地震》2015年第2期28-31,共4页Earthquake Research in Sichuan

摘　　要：目前在地震研究领域,绝大多数地电阻率观测台站均采用温纳装置,按照单极距方式进行观测,观测的视电阻率变化应该是表层变化(主要是干扰)和测区范围内深部变化(地下介质应力与应变状态发生变化)的综合变化。随着社会和经济的发展以及城市化进程的加快,城市基本建设范围快速扩张,不少地电阻率观测站受到各种各样的干扰,其中,地电阻率测区及附近埋地金属管道的影响是最主要的干扰因素之一。通过数值模拟进行了定性和半定量分析,找出了金属管道的物理属性、几何属性、埋设位置与干扰大小的关系,以方便数据中异常的识别。In most of seismic research field at present, the instrument for the apparent resistivity or earth-resistivity measurement is Wenner device and the single pole layout is used. The measurement result of apparent resistivity mainly shows a comprehensive change of upper part of surface and the stress changes of the inner crust medium. The changes caused by the upper surface are called interference, With the development of social economy and ur- ban construction of infrastructure in China more and more seismic stations for apparent resistivity or earth - resistivi- ty measurement are affected by many kinds of interferences. The metal pipe line of water supply is one of interfer- ences. We use digital analogue to semi-qualitatively analyze and quantitatively analyze the interfere and try to find the physical attribute, the geometry and the position of the buried metal pipe line in order to recognized the interfere in seismic data.

关 键 词：视电阻率 干扰 金属管道 数值模拟 

分 类 号：P315.722[天文地球—地震学]