瞬变电磁法在吉林省辽源市煤矿采空区勘探中的应用  

Study on the Applicatiom of Transient Electromagnetic Method in Goaf Exploration in Liaoyuan City,Jilin Province

作　　者：崔迎龙[1] 卢克鹏 Cui Yinglong;Lu Kepeng(Jilin Team of Geological Survey Center of China Building Materials Industry,Changchun Jinlin 130000,China;The Jilin Geological Exploration Institute of China National Geological and Mining Administration,Changchun Jinlin 130000,China)

机构地区：[1]中国建筑材料工业地质勘查中心吉林总队,吉林长春130000 [2]中化地质矿山总局吉林地质勘查院,吉林长春130000

出　　处：《工程地球物理学报》2024年第4期587-596,共10页Chinese Journal of Engineering Geophysics

基　　金：吉林省大型地质灾害防治专项资金项目(编号:JLTXY-2023-036)。

摘　　要：瞬变电磁法采用电磁感应原理,可以有效的进行地层划分,并推断单一剖面的煤矿采空影响区的分布位置、埋藏深度及纵向厚度,可以达到传统意义上的纵向二维(2 Dimensional,2D)勘探效果。本文是在大量收集勘探区基础地质资料的基础上,结合勘探区内采空区的特点及其围岩的地球物理特征,通过对传统意义上的实测剖面数据进行处理、反演,不仅绘制出各剖面视电阻率反演拟断面图,达到传统意义上的纵向二维(2D)勘探效果;还通过GeoIPAS软件将反演数据重新整合处理,绘制不同标高的视电阻率反演平面等值线图,可以达到软件构建的横向二维(2D)勘探效果;并根据横向、纵向二维(2D)勘探成果绘制三维立体图,通过立体三维(3 Dimensional,3D)勘探效果进行更直观的解译分析。最后综合剖面断面图、平面等值线图及三维立体图,绘制综合解译成果图,划分煤矿采空影响区的平面异常,圈定异常位置及分布范围。所圈定的两处平面异常进行了钻探验证,验证结果与瞬变电磁法推断解译结果吻合度较高。这说明本文研究成果对提高瞬变电磁法在煤矿采空区探测精度上具有实际应用价值。The transient electromagnetic method adopts the principle of electromagnetic induction to effectively divide the strata and infer the distribution location,burial depth and longitudinal thickness of the coal mining affected area in a single section,which can achieve the vertical 2D exploration effect in the traditional sense.Based on a large number of basic geological data collected in the exploration area,combined with the goaf characteristics and the geophysical characteristics of the surrounding rock in the exploration area,this paper not only draws the pseudo-section of the apparent resistivity inversion of each section,but also achieves the vertical 2D exploration effect in the traditional sense.Moreover,GeoIPAS software is used to reintegrate and process the inversion data to draw the inversion plane contour map of apparent resistivity at different elevations,which can achieve the horizontal 2D exploration effect constructed by the software.According to the horizontal and vertical two-dimensional(2D)exploration results,three-dimensional map is drawn,and the three-dimensional(3D)exploration effect is more intuitively interpreted.Finally,a comprehensive interpretation result map is drawn by synthesizing the profile,plane contour map and three-dimensional map,and the plane anomaly in the affected area of coal mining is divided,and the anomaly location and distribution range are delineated.The two plane anomalies delineated are verified by drilling,and the verified results are in good agreement with the inferred and interpreted results of transient electromagnetic method,which shows that the research results of this paper have practical application value to improve the detection accuracy of transient electromagnetic method in coal mine goaf.

关 键 词：瞬变电磁法 视电阻率 三维立体勘探 煤矿采空区 钻探验证 

分 类 号：P631.3[天文地球—地质矿产勘探]