基于EVS建模分析物探-钻探在Cr(Ⅵ)污染场地勘察中的应用  

Application of Geophysical Prospecting and Drilling in Cr(Ⅵ)Contaminated Site Investigation Based on EVS Modeling

作　　者：郭佳林 刘芳 楚振哲[2,3,4] 杨旭 GUO Jialin;LIU Fang;CHU Zhenzhe;YANG Xu(School of Rare Earth Industry,Inner Mongolia University of Science and Technology,Baotou 014000,China;School of Materials Science and Engineering,Inner Mongolia University of Science and Technology,Baotou 014000,China;Inner Mongolia Key Laboratory of Advanced Ceramic Material and Devices,Baotou 014000,China;Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources,Ministry of Education,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学稀土产业学院,内蒙古包头014000 [2]内蒙古科技大学材料科学与工程学院,内蒙古包头014000 [3]内蒙古自治区先进陶瓷材料与器件重点实验室,内蒙古包头014000 [4]内蒙古科技大学轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古包头014010

出　　处：《环境科学与技术》2024年第10期171-178,共8页Environmental Science & Technology

基　　金：国家重点研发计划:高盐、强酸/碱场地原位固化稳定化/氧化修复技术(2019YFC1806004)。

摘　　要：为了探索物探和钻探技术在污染场地勘察中的综合应用,该研究选取河北省某铬污染场地作为案例。通过EVS软件对钻探数据进行三维建模,并结合高密度电法勘测结果综合分析了污染物的分布特征。建模结果揭示了试验地块的总体积为306.822 m^(3),其中Cr(Ⅵ)含量超标的体积达299.049 m^(3)。具体来看,超标1倍的体积为287.71 m^(3),2倍和3倍的分别仅为10.522 m^(3)和0.817 m^(3)。Cr(Ⅵ)含量在1倍超标时在地层中分布较为均匀,但在2~3倍超标时,主要集中于粉质黏土层,且底层Cr(Ⅵ)浓度较高。高密度电法勘测显示,粉砂、粉土和粉质黏土的视电阻率分别为2.5~5Ω·m、1~2.5Ω·m和小于1Ω·m,表明该技术对地层的响应良好。研究结果表明,EVS建模在清晰度和完整性方面优于传统分析方法,有助于更准确地评估污染场地的状况。此外,该方法通过区分不同土层,增强了物探分析的效能。然而,由于依赖钻探数据,模型可能受到钻孔数量的限制。高密度电法勘测作为一种有效的辅助手段,在钻探前能够识别不同地层,减少钻孔数量,同时确保模型建立的可信度。尽管如此,由于影响因素众多,视电阻率变化的原因难以简单归结。总体而言,结合EVS建模和高密度电法勘测不仅可以有效降低钻探工作量,还能准确识别污染严重区域,为污染场地的修复提供重要信息。In order to explore the comprehensive application of geophysical exploration and drilling technology in the investi⁃gation of contaminated sites,a chromium contaminated site in Hebei Province was selected as a case study.The 3D modeling of drilling data was carried out by EVS software,and the distribution characteristics of pollutants were analyzed comprehen⁃sively by combining the results of high-density electrical survey.The modeling results reveal that the total volume of the test block is 306.822 m^(3),and the volume of Cr(Ⅵ)exceeding the standard is 299.049 m^(3).Specifically,the volume of double ex⁃ceeding the standard is 287.71 m^(3),and the volume of double and triple times is only 10.522 m^(3) and 0.817 m^(3),respectively.When the content of Cr(Ⅵ) is doubled,the distribution in the formation is relatively uniform,but when the content of Cr(Ⅵ)is doubled to triple,it is mainly concentrated in the silty clay layer,and the bottom Cr(Ⅵ)concentration is higher.The apparent resistivity of silty sand,silt and silty clay is 2.5~5Ω·m,1~2.5Ω·m and less than 1Ω·m,respectively,indicating that the tech⁃nology responds well to the formation.The results of this study show that EVS modeling is superior to traditional analytical methods in terms of clarity and completeness,helping to more accurately assess the condition of contaminated sites.In addi⁃tion,the method enhances the efficiency of geophysical analysis by distinguishing different soil layers.However,due to the re⁃liance on drilling data,the model may be limited by the number of holes drilled.High-density electrical surveying is an effective auxiliary means to identify different formations before drilling,reducing the number of holes drilled and ensuring the reli⁃ability of the model.However,due to many factors,the cause of apparent resistivity change is difficult to be simply attributed.In general,the combination of EVS modeling and high-density electrical survey can not only effectively reduce the drilling workload,but also accuratel

关 键 词：EVS建模 钻孔 高密度电法 污染场地勘察 

分 类 号：X53[环境科学与工程—环境工程]