抗干扰电法仪在强电磁干扰环境探测断层的应用  

Application of Anti-interference Electric Instrument to Detection of Fault in Strong Electromagnetic Interference Environment

作　　者：葛志广[1] 陈永生 付方华 

机构地区：[1]北京勘察技术工程有限公司,北京100092 [2]北京得一成利环境工程技术有限责任公司,北京100081

出　　处：《工程地球物理学报》2017年第5期541-545,共5页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金项目(编号:40774073)

摘　　要：为了给规划中的某新区提供基础地质资料,需查明区内断层的准确位置、产状以及覆盖层厚度。由于区内人文干扰和电磁干扰严重,常规电法仪的重复观测误差太大,不能获得准确数据,故采用伪随机码技术,提高信噪比。运用专业的电法反演软件Res2Dinv进行二维反演,获得相应的二维反演电阻率模型断面。通过分析反演结果并结合已知地质资料,推断了区内断裂的位置、产状等信息,经钻探验证,推断的断层信息准确,为新区规划提供了可靠的基础资料。In order to provide basic geological information for a new area in the planning,it needs to identify the exact location of the fault zone,occurrence and coating thickness.As the severe human interference and electromagnetic interference in the region,the repeated observation error of conventional electric instrument is too large and can′t get the accurate data.Therefore,this paper uses pseudo-random code technology to improve the ratio of signal to noise.A professional electrical method for 2Dinversion software Res2 Dinv is used to obtain the corresponding 2D model section of inversion resistivity.By analyzing the inversion results and the known geological data,the exact location of fracture region and other information are inferred.Through drilling verification,the inferred fault information is accurate,which provides a reliable basis for information of the district planning.

关 键 词：伪随机码 视电阻率 反演 

分 类 号：P631.3[天文地球—地质矿产勘探]