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基于CSAMT电场分量的电性标志层深度校正技术及应用

刘最亮 张奋轩 张继锋 周光裕 赵辉 张新

刘最亮, 张奋轩, 张继锋, 周光裕, 赵辉, 张新. 基于CSAMT电场分量的电性标志层深度校正技术及应用[J]. 煤田地质与勘探, 2021, 49(4): 24-32. doi: 10.3969/j.issn.1001-1986.2021.04.004
引用本文: 刘最亮, 张奋轩, 张继锋, 周光裕, 赵辉, 张新. 基于CSAMT电场分量的电性标志层深度校正技术及应用[J]. 煤田地质与勘探, 2021, 49(4): 24-32. doi: 10.3969/j.issn.1001-1986.2021.04.004
LIU Zuiliang, ZHANG Fenxuan, ZHANG Jifeng, ZHOU Guangyu, ZHAO Hui, ZHANG Xin. Depth correction technique of electrical marker based on electrical field component of CSAMT[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(4): 24-32. doi: 10.3969/j.issn.1001-1986.2021.04.004
Citation: LIU Zuiliang, ZHANG Fenxuan, ZHANG Jifeng, ZHOU Guangyu, ZHAO Hui, ZHANG Xin. Depth correction technique of electrical marker based on electrical field component of CSAMT[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(4): 24-32. doi: 10.3969/j.issn.1001-1986.2021.04.004

基于CSAMT电场分量的电性标志层深度校正技术及应用

doi: 10.3969/j.issn.1001-1986.2021.04.004
基金项目: 

国家重点研发计划课题 2018YFC0807806

陕西省自然科学基金项目 2021JM-159

详细信息
    第一作者:

    刘最亮,1974年生,男,山西平遥人,博士,教授级高级工程师,从事煤田地质与勘探工作. E-mail:liuzuiliang@163.com

    通信作者:

    张继锋,1978年生,男,陕西蒲城人,博士,副教授,从事电法勘探理论及应用研究. E-mail:zjf0201@126.com

  • 中图分类号: P631

Depth correction technique of electrical marker based on electrical field component of CSAMT

  • 摘要: 可控源音频大地电磁(CSAMT)是探测含煤地层富水区及采空区的重要地球物理方法,但其探测深度误差比较大,采用电性标志层进行深度校正,达到精确解释地层的目的。首先,提出基于电场单分量视电阻率计算方法,只需通过平移即可获得全区视电阻率,无需迭代,简单快速。接着,分析视电阻率微分极值与电性标志层的关系,通过测井电阻率曲线识别出电性标志层,然后通过比值计算深度校正系数,在全区进行插值得到任意测点的校正深度。对新元煤矿31004工作面R280测线数据进行深度校正处理,结果表明:校正后的深度和实际地层基本吻合。最后,通过已知充水采空区边界、淋水点以及钻孔揭示的结果进行对比验证,达到了预期效果。该方法为CSAMT在含煤地层进行精细化数据处理和解释提供了新的思路。

     

  • 图  1  可控源电磁法示意图

    Fig. 1  Schematic chart of CSAMT

    图  2  基于电场全区视电阻率和卡尼亚视电阻率比较

    Fig. 2  Comparison of all time apparent resistivity based on electric field and Cagniad apparent resistivity

    图  3  理论模型电场全区视电阻率导数

    Fig. 3  Derivative of all time apparent resistivity based on electric field of theoretical geoelectric model

    图  4  测井旁视电阻率及其导数

    Fig. 4  Apparent resistivity by logging and its derivative

    图  5  抽象的理论模型及其视电阻率导数

    Fig. 5  Theoretical model and its apparent resistivity derivative

    图  6  电场视电阻率断面图

    Fig. 6  Apparent resistivity section based on electric field

    图  7  静态效应校正的电场视电阻率断面图

    Fig. 7  Apparent resistivity section based on electric field after correction of static shift

    图  8  电场视电阻率纵向导数

    Fig. 8  Derivative of apparent resistivity based on electric field

    图  9  深度校正后电场视电阻率断面图

    Fig. 9  Section of apparent resistivity based on electric field after depth correction

    图  10  R280线采空区边界和淋水点对比验证

    Fig. 10  Comparison and verification diagram of goaf boundary and water pouring point on R280 line

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  • 收稿日期:  2020-12-10
  • 修回日期:  2021-04-28
  • 刊出日期:  2021-08-25
  • 网络出版日期:  2021-09-10

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