采空区地震与电法探测数据的联合反演研究及应用  

Joint inversion technology of seismic and ERT data and its application in the detection of mine goaf

作　　者：石战结[1,2] 余天祥 韩文功 张光德 陈吴金 张怀榜 SHI Zhan-jie;YU Tian-xiang;HAN Wen-gong;ZHANG Guang-de;CHEN Wu-jin;ZHANG Huai-bang(School of Earth Sciences,Zhejiang University,Hangzhou 310027,China;Cultural Heritage Institute,Zhejiang University,Hangzhou 310058,China;Sinopec Petroleum Engineering Geophysical Company Limited,Shengli Branch,Dongying 257086,China)

机构地区：[1]浙江大学地球科学学院,杭州310027 [2]浙江大学文化遗产研究院,杭州310058 [3]中石化地球物理公司胜利分公司,东营257086

出　　处：《地球物理学进展》2020年第1期345-350,共6页Progress in Geophysics

基　　金：国家自然科学基金(41104072,41974115);浙江省自然科学基金(LY19D040001);中石化石油工程地球物理有限公司科技项目(10200274-17-ZC0613-0018)联合资助.

摘　　要：综合地球物理技术在采空区的探测中发挥了重要作用.目前通常采用单方法反演、仅对不同方法反演结果进行对比解释的综合勘探方式,单方法反演的多解性严重降低了其探测精度.如何提高采空区的探测精度,对采空区进行有效探测一直被认为是地球物理技术面临的首要难题.为了提高地震与电法技术的探测精度,基于交叉梯度联合反演理论,设计了地震初至折射走时数据和高密度电法数据的联合反演算法流程,对采空区理论模型和野外实际数据进行了联合反演处理.结果发现通过两者的联合反演,不仅可以提高采空区电阻率反演模型的成像效果,而且能够获得地震单方法反演难以成像的采空区低速异常体,从而提高了地震与电法技术对采空区的探测精度.表明地震与电法探测数据联合反演是一种提高采空区探测精度的有效方法.Geophysical technologies have played an important role in the investigation of mine goaf.Usually,geophysical data are processed using individual inversion method and the imaging precision is decreased for the ambiguity.It is the most difficult to detect mine goaf accurately and effectively for geophysical technologies.In order to improve the detection precision of seismic refraction and Electrical Resistivity Tomography(ERT)technologies,based on the cross-gradient joint inversion theory,a joint inversion algorithm and flow for seismic refraction travel-time data and ERT data are designed.And the joint inversion processing was finished for the synthetic and field data.The results show that the joint inversion can not only improve the imaging precision of the resistivity inversion model,but also the low velocity anomaly can be imaged which is related with mine goaf and is very difficult to image by the seismic individual inversion.So the detection precision of seismic and ERT technologies are improved by joint inversion.It is concluded that joint inversion of seismic and ERT data is an effective and valuable method to increase the detection accuracy of mine goaf.

关 键 词：采空区 地震走时层析 高密度电法 联合反演 探测精度 

分 类 号：P631[天文地球—地质矿产勘探]