基于钻探约束的瞬变电磁解释方法及应用
|
摘要
随着我国城镇建设的飞速发展,城镇建筑用地范围不断扩大,所面临的近地表地质构造越来越复杂,常规钻探法难以满足地基勘查的需要。为此,基于优势互补理念,将瞬变电磁法空间采样率高、地质信息丰富、地质体横向边界刻画准确等优势与钻探垂向测深精度高、分层定位准确等优势相结合,提出基于钻探约束的瞬变电磁法解释新方法,较好地克服了常规瞬变电磁法计算深度精度不足的局限,提高了视电阻率剖面的纵向解释能力。通过浩金元住宅建设区采空区探测的应用试验,圈定了测区中东部存在一个面积约0.01 km2的采空积水区,中部存在一个面积约0.009 75 km2的非采空区,其他部分均为采空区,取得了良好的应用效果。
With the rapid expansion of the scope of urban construction, the near-surface geological structure is more and more complex. The conventional drilling method is difficult to meet the needs of the foundation exploration. For this reason, based on theory of complementary advantages, a new idea inversing apparent resistivity by the transient electromagnetic data under the constraint of drilling data is put forward, which combines the advantages of the transient electromagnetic method(TEM), such as high space sampling rate, rich geological information, accurate determining of lateral boundary of geological body and so on, and the advantages of drilling, such as high precision vertical sounding, accurate layering and so on. A new interpretation method of TEM data based on drilling constraint is given, which can better overcome the limits of traditional TEM method to get high accuracy depth results difficultly and improve the depth explain ability of calculating apparent resistivity section. The goaf detection results in Haojinyuan house construction area show the new interpretation method can obtain good effect, which determine a coal goaf water area about 0.01 km2 in the central section, and a non-goaf area about 0.009 75 km2 in the mid-east region, and infer other region are coal goaf area.
With the rapid expansion of the scope of urban construction, the near-surface geological structure is more and more complex. The conventional drilling method is difficult to meet the needs of the foundation exploration. For this reason, based on theory of complementary advantages, a new idea inversing apparent resistivity by the transient electromagnetic data under the constraint of drilling data is put forward, which combines the advantages of the transient electromagnetic method(TEM), such as high space sampling rate, rich geological information, accurate determining of lateral boundary of geological body and so on, and the advantages of drilling, such as high precision vertical sounding, accurate layering and so on. A new interpretation method of TEM data based on drilling constraint is given, which can better overcome the limits of traditional TEM method to get high accuracy depth results difficultly and improve the depth explain ability of calculating apparent resistivity section. The goaf detection results in Haojinyuan house construction area show the new interpretation method can obtain good effect, which determine a coal goaf water area about 0.01 km2 in the central section, and a non-goaf area about 0.009 75 km2 in the mid-east region, and infer other region are coal goaf area.
引文
[1]冉恒谦,张金昌,谢文卫,等.地质钻探技术与应用研究[J].地质学报,2011,85(11):1806–1822.RAN Hengqian,ZHANG Jinchang,XIE Wenwei,et al.Applications study of geo-drilling technology[J].Acta Geologica Sinica,2011,85(11):1806–1822.
[2]智庆全,武军杰,王兴春,等.三分量定源瞬变电磁解释技术及其在金属矿区的实验[J].物探与化探,2016,40(4):798–803.ZHI Qingquan,WU Junjie,WANG Xingchun,et al.Three-component interpretation technique of fixed source TEM and its experimental application in metallic ore district[J].Geophysical and Geochemical Exploration,2016,40(4):798–803.
[3]刘文波,李磊涛.瞬变电磁法在荒漠地区地下水探测中的应用[J].金属矿山,2012(9):96–98.LIU Wenbo,LI Leitao.Application of underground water sounding using transient electromagnetic method in desert zone[J].Metal Mine,2012(9):96–98.
[4]MASSOUD U,ABBAS A M,MESBAH S A,et al.Mapping of subsoil water level and its impacts on Hawara archeological site by transient and multi-frequency electromagnetic survey[J].Chinese Journal of Geophysics,2010,53(3):638–645.
[5]刘磊,罗士新,陈松.综合物探方法在乌林镇地热勘查中的应用[J].工程地球物理学报,2015,12(4):495–450.LIU Lei,LUO Shixin,CHEN Song.The application of integrated geophysical method to geothermal exploration in Wulin town[J].Chinese Journal of Engineering Geophysics,2015,12(4):495–450.
[6]路拓,刘盛东,王勃,等.综合矿井物探技术在含水断层探测中的应用[J].地球物理学进展,2015,30(3):1371–1375.LU Tuo,LIU Shengdong,WANG Bo,et al.Application of integrated mining geophysical method in detection of water-bearing faults[J].Progress in Geophysics,2015,30(3):1371–1375.
[7]韩德品,郭林生,赵利利,等.瞬变电磁法快速探查煤矿突水构造关键技术及应用效果[J].煤田地质与勘探,2014,42(6):7–10.HAN Depin,GUO Linsheng,ZHAO Lili,et al.The key technology and application effects of transient electromagnetic method for rapid detecting water inrush structure in coal mine[J].Coal Geology&Exploration,2014,42(6):7–10.
[8]解海军,孟小红,王信文,等.煤矿积水采空区瞬变电磁法探测的附加效应[J].煤田地质与勘探,2009,37(2):71–74.XIE Haijun,MENG Xiaohong,WANG Xinwen,et al.The additional effect of TEM detection and its application in coal mined-out area with accumulated water[J].Coal Geology&Exploration,2009,37(2):71–74.
[9]梁爽.瞬变电磁法在煤矿水害防治中的应用[J].煤田地质与勘探,2012,40(3):70–73.LIANG Shuang.The application of TEM in detecting water hazards in coal mines[J].Coal Geology&Exploration,2012,40(3):70–73.
[10]焦险峰.地面–巷道瞬变电磁探测技术研究[D].徐州:中国矿业大学,2016.
[11]刘晓.瞬变电磁法三维正演及非线性共轭梯度反演研究[D].北京:中国地质大学,2016.
[12]NABIGHIAN M N.Quasi-static transient response of a conductive half space:An approximate representation[J].Geophysics,1979,44(10):1700–1705.
[13]赖刘保,陈昌彦,张辉,等.浅层瞬变电磁法在城市道路地下病害检测中的应用[J].地球物理学进展,2016,31(6):2743–2746.LAI Liubao,CHEN Changyan,ZHANG Hui,et al.Application of shallow transient electromagnetic method in the detection of city road disease[J].Progress in Geophysics,2016,31(6):2743–2746.
[14]许建荣,李爱勇,杨生.TEM中心回线法瞬变磁场求取和全区视电阻率计算[J].地质与勘探,2008,44(6):62–68.XU Jianrong,LI Aiyong,YANG Sheng.Calculation of transient magnetic field and all time apparent resistivity based on central TEM loops method[J].Geology and Exploration,2008,44(6):62–68.
[15]LEE T.Estimation of depth to conductors by the use of electromagnetic transients[J].Geophysics,1977(65):61–75.
[16]RAICHE A P,GALLAGHER R G.Apparent resistivity and diffusion velocity[J].Journal of Applied Geophysics,2000(4):1628–1633.
[17]吴小平,吴云鹏.时间域电磁法视电阻率的一种数值计算方法[J].地球物理学进展,2012,27(6):2548–2553.WU Xiaoping,WU Yunpeng.A numerical calculating method for apparent resistivity of TEM sounding[J].Progress in Geophysics,2012,27(6):2548–2553.
[18]翁爱华,陆冬华,刘国兴.利用连分式定义瞬变电磁法全区视电阻率研究[J].煤田地质与勘探,2003,31(3):56–59.WONG Aihua,LU Donghua,LIU Guoxing.Definition of whole zone apparent resistivity for transient electromagnetic method of current dipole source[J].Coal Geology&Exploration,2003,31(3):56–59.
[19]郝延松,胡博,于润桥,等.磁性源瞬变电磁法视电阻率计算方法[J].物探与化探,2012,36(6):1034–1039.HAO Yansong,HU Bo,YU Runqiao,et al.The calculation of the apparent resistivity for magnetic source TEM[J].Geophysical&Geochemical Exploration,2012,36(6):1034–1039.
[20]岳建华,杨海燕,邓居智.层状介质中地下瞬变电磁场全空间效应[J].地球物理学进展,2012,27(4):1385–1392.YUE Jianhua,YANG Haiyan,DENG Juzhi.Whole-space effect on underground transient electromagnetic field in layered media[J].Progress in Geophysics,2012,27(4):1385–1392.
[21]白登海,MEJU M A,卢健,等.时间域瞬变电磁法中心方式全程视电阻率的数值计算[J].地球物理学报,2003,46(5):697–704.BAI Denghai,MEJU M A,LU Jian,et al.Numerical calculation of all-time apparent resistivity for the central loop transient electromagnetic method[J].Chinese Journal of Geophysics,2003,46(5):697–704.
[22]丁艳飞,白登海,许诚.均匀半空间表面大定源瞬变电磁响应的快速算法[J].地球物理学报,2012,55(6):2087–2096.DING Yanfei,BAI Denghai,XU Cheng.A rapid algorithm for calculating time domain transient electromagnetic responses of a large fixed rectangular loop on the half space[J].Chinese Journal of Geophysics,2012,55(6):2087–2096.
[2]智庆全,武军杰,王兴春,等.三分量定源瞬变电磁解释技术及其在金属矿区的实验[J].物探与化探,2016,40(4):798–803.ZHI Qingquan,WU Junjie,WANG Xingchun,et al.Three-component interpretation technique of fixed source TEM and its experimental application in metallic ore district[J].Geophysical and Geochemical Exploration,2016,40(4):798–803.
[3]刘文波,李磊涛.瞬变电磁法在荒漠地区地下水探测中的应用[J].金属矿山,2012(9):96–98.LIU Wenbo,LI Leitao.Application of underground water sounding using transient electromagnetic method in desert zone[J].Metal Mine,2012(9):96–98.
[4]MASSOUD U,ABBAS A M,MESBAH S A,et al.Mapping of subsoil water level and its impacts on Hawara archeological site by transient and multi-frequency electromagnetic survey[J].Chinese Journal of Geophysics,2010,53(3):638–645.
[5]刘磊,罗士新,陈松.综合物探方法在乌林镇地热勘查中的应用[J].工程地球物理学报,2015,12(4):495–450.LIU Lei,LUO Shixin,CHEN Song.The application of integrated geophysical method to geothermal exploration in Wulin town[J].Chinese Journal of Engineering Geophysics,2015,12(4):495–450.
[6]路拓,刘盛东,王勃,等.综合矿井物探技术在含水断层探测中的应用[J].地球物理学进展,2015,30(3):1371–1375.LU Tuo,LIU Shengdong,WANG Bo,et al.Application of integrated mining geophysical method in detection of water-bearing faults[J].Progress in Geophysics,2015,30(3):1371–1375.
[7]韩德品,郭林生,赵利利,等.瞬变电磁法快速探查煤矿突水构造关键技术及应用效果[J].煤田地质与勘探,2014,42(6):7–10.HAN Depin,GUO Linsheng,ZHAO Lili,et al.The key technology and application effects of transient electromagnetic method for rapid detecting water inrush structure in coal mine[J].Coal Geology&Exploration,2014,42(6):7–10.
[8]解海军,孟小红,王信文,等.煤矿积水采空区瞬变电磁法探测的附加效应[J].煤田地质与勘探,2009,37(2):71–74.XIE Haijun,MENG Xiaohong,WANG Xinwen,et al.The additional effect of TEM detection and its application in coal mined-out area with accumulated water[J].Coal Geology&Exploration,2009,37(2):71–74.
[9]梁爽.瞬变电磁法在煤矿水害防治中的应用[J].煤田地质与勘探,2012,40(3):70–73.LIANG Shuang.The application of TEM in detecting water hazards in coal mines[J].Coal Geology&Exploration,2012,40(3):70–73.
[10]焦险峰.地面–巷道瞬变电磁探测技术研究[D].徐州:中国矿业大学,2016.
[11]刘晓.瞬变电磁法三维正演及非线性共轭梯度反演研究[D].北京:中国地质大学,2016.
[12]NABIGHIAN M N.Quasi-static transient response of a conductive half space:An approximate representation[J].Geophysics,1979,44(10):1700–1705.
[13]赖刘保,陈昌彦,张辉,等.浅层瞬变电磁法在城市道路地下病害检测中的应用[J].地球物理学进展,2016,31(6):2743–2746.LAI Liubao,CHEN Changyan,ZHANG Hui,et al.Application of shallow transient electromagnetic method in the detection of city road disease[J].Progress in Geophysics,2016,31(6):2743–2746.
[14]许建荣,李爱勇,杨生.TEM中心回线法瞬变磁场求取和全区视电阻率计算[J].地质与勘探,2008,44(6):62–68.XU Jianrong,LI Aiyong,YANG Sheng.Calculation of transient magnetic field and all time apparent resistivity based on central TEM loops method[J].Geology and Exploration,2008,44(6):62–68.
[15]LEE T.Estimation of depth to conductors by the use of electromagnetic transients[J].Geophysics,1977(65):61–75.
[16]RAICHE A P,GALLAGHER R G.Apparent resistivity and diffusion velocity[J].Journal of Applied Geophysics,2000(4):1628–1633.
[17]吴小平,吴云鹏.时间域电磁法视电阻率的一种数值计算方法[J].地球物理学进展,2012,27(6):2548–2553.WU Xiaoping,WU Yunpeng.A numerical calculating method for apparent resistivity of TEM sounding[J].Progress in Geophysics,2012,27(6):2548–2553.
[18]翁爱华,陆冬华,刘国兴.利用连分式定义瞬变电磁法全区视电阻率研究[J].煤田地质与勘探,2003,31(3):56–59.WONG Aihua,LU Donghua,LIU Guoxing.Definition of whole zone apparent resistivity for transient electromagnetic method of current dipole source[J].Coal Geology&Exploration,2003,31(3):56–59.
[19]郝延松,胡博,于润桥,等.磁性源瞬变电磁法视电阻率计算方法[J].物探与化探,2012,36(6):1034–1039.HAO Yansong,HU Bo,YU Runqiao,et al.The calculation of the apparent resistivity for magnetic source TEM[J].Geophysical&Geochemical Exploration,2012,36(6):1034–1039.
[20]岳建华,杨海燕,邓居智.层状介质中地下瞬变电磁场全空间效应[J].地球物理学进展,2012,27(4):1385–1392.YUE Jianhua,YANG Haiyan,DENG Juzhi.Whole-space effect on underground transient electromagnetic field in layered media[J].Progress in Geophysics,2012,27(4):1385–1392.
[21]白登海,MEJU M A,卢健,等.时间域瞬变电磁法中心方式全程视电阻率的数值计算[J].地球物理学报,2003,46(5):697–704.BAI Denghai,MEJU M A,LU Jian,et al.Numerical calculation of all-time apparent resistivity for the central loop transient electromagnetic method[J].Chinese Journal of Geophysics,2003,46(5):697–704.
[22]丁艳飞,白登海,许诚.均匀半空间表面大定源瞬变电磁响应的快速算法[J].地球物理学报,2012,55(6):2087–2096.DING Yanfei,BAI Denghai,XU Cheng.A rapid algorithm for calculating time domain transient electromagnetic responses of a large fixed rectangular loop on the half space[J].Chinese Journal of Geophysics,2012,55(6):2087–2096.