Coal Geology & Exploration


A new transmitter device-conical source has been proved theoretically to have several advantages for transient electromagnetic sounding. To verify application ability of conical source, two kinds of transmitter devices were designed and made, and the experimental studies on surface and in mine roadway were carried out. By applying high density resistivity achievements in surface experiment, the detecting results using conical source and multi-coils were compared. The results show that the description of strata resistivity with conical source is better than that with multi-coils. One fault was identified and the strike and position of which matches the high density resistivity result better. Meanwhile, experiment results in mine roadway also show that the conical source can achieve more effective delineation of low resistivity zone than multi-coils; the low resistivity zone in multi-coils section was turned out to be two discontinuous areas in conical source section. In addition, the conical source has a higher resolution of conductor in mine drift. The shape and area of conical source are more stable, which is more helpful to improve the efficiency and data quality of the transient electromagnetic method.


transient electromagnetic method, conical source, high density resistivity method, apparent resistivity, advanced detection




[1] DI Qingyun, XUE Guoqiang, YIN Changchun, et al. New methods of controlled-source electromagnetic detection in China[J]. Science China Earth Sciences, 2020, 50(9): 1219–1227. 底青云, 薛国强, 殷长春, 等. 中国人工源电磁探测新方法[J]. 中国科学: 地球科学, 2020, 50(9): 1219–1227.

[2] XUE Guoqiang, ZHANG Linbo, ZHOU Nannan, et al. Developments measurements of TEM sounding in China[J]. Geological Journal, 2020, 55(3): 1636–1643.

[3] XUE Guoqiang, CHEN Wen, CHENG Jiulong, et al. A review of electrical and electromagnetic methods for coal mine exploration in China[J]. IEEE Access, 2019, 7: 177332–177341.

[4] ZHAO Zhongnan, XU Yangcheng, WU Yanqing, et al. Evaluation on the resolution ability of underground transient electromagnetic instrument to disaster-causing water bodies[J]. Coal Geology & Exploration, 2021, 49(4): 40–48. 赵钟南, 许洋铖, 吴燕清, 等. 井下瞬变电磁仪硬件对致灾水体分辨能力的评估[J]. 煤田地质与勘探, 2021, 49(4): 40–48.

[5] ZHANG Pingsong, LI Shenglin, QIU Shi, et al. Advance detection technology and development of fast intelligent roadway drivage[J]. Journal of China Coal Society, 2021, 46(7): 2158–2173. 张平松, 李圣林, 邱实, 等. 巷道快速智能掘进超前探测技术与发展[J]. 煤炭学报, 2021, 46(7): 2158–2173.

[6] LIU Jie, DUAN Wei, WANG Jun, et al. The application of opposing coils transient electromagnetic method to the detection of underground collapse in highway tunnel under construction[J]. Geophysical and Geochemical Exploration, 2020, 44(6): 1470–1475. 刘杰, 段炜, 王俊, 等. 等值反磁通瞬变电磁法在公路隧道塌陷区的探测应用[J]. 物探与化探, 2020, 44(6): 1470–1475.

[7] GUO Chun, XING Wenping, LI Wenjun. Application of transient electromagnetic techniques to grouting reconstruction of lower confining bed[J]. Coal Geology & Exploration, 2006, 34(4): 74–76. 郭纯, 邢文平, 李文军. 瞬变电磁技术在煤层底板含水层注浆改造中的应用[J]. 煤田地质与勘探, 2006, 34(4): 74–76.

[8] LIU Zhixin, YU Jingcun, ZHANG Hua, et al. Application of wavelet transfer in coal mine transient electromagnetic method[J]. Coal Geology & Exploration, 2007, 35(4): 70–71. 刘志新, 于景邨, 张华, 等. 小波变换在矿井瞬变电磁法中的应用[J]. 煤田地质与勘探, 2007, 35(4): 70–71.

[9] YIN Jiankang, YAN Shu, CHEN Mingsheng. Small transmitter loop device and its application in transient electromagnetic method[J]. Coal Geology & Exploration, 2007, 35(3): 66–68. 阴建康, 闫述, 陈明生. 瞬变电磁法小发射回线探测装置及其应用[J]. 煤田地质与勘探, 2007, 35(3): 66–68.

[10] SHI Xianxin, LI Hua, YAN Shu, et al. Down-hole electromagnetic method for detecting deep high-pressure water hazard[J]. Coal Geology & Exploration, 2008, 36(6): 58–61. 石显新, 李华, 闫述, 等. 深部高压水害隐患探测的井下电磁法技术[J]. 煤田地质与勘探, 2008, 36(6): 58–61.

[11] 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. 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.

[12] LIANG Shuang. The application of TEM in detecting water hazards in coal mines[J]. Coal Geology & Exploration, 2012, 40(3): 70–73. 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.

[13] YANG Haiyan, YUE Jianhua, LI Fengping. The decay characteristics of transient electromagnetic fields stimulated by ramp step current in multi-turn small coil[J]. Chinese Journal of Geophysics, 2019, 62(9): 3615–3628. 杨海燕, 岳建华, 李锋平. 斜阶跃电流激励下多匝小回线瞬变电磁场延时特征[J]. 地球物理学报, 2019, 62(9): 3615–3628.

[14] TANG Hongzhi, YANG Haiyan, LU Guangyin, et al. Small multi-turn coils based on transient electromagnetic method for coal mine detection[J]. Journal of Applied Geophysics, 2019, 169: 165–173.

[15] LIU Jianpeng, YANG Haiyan, JIAO Junjun, et al. Research on layered whole-space response of underground transient electromagnetic method[J]. Progress in Geophysics, 2021, 36(1): 202–210. 刘建鹏, 杨海燕, 焦俊俊, 等. 层状全空间瞬变电磁响应理论研究[J]. 地球物理学进展, 2021, 36(1): 202–210.

[16] YANG Haiyan, LI Fengping, YUE Jianhua, et al. Cone-shaped source characteristics and inductance effect of transient electromagnetic method[J]. Applied Geophysics, 2017, 14(1): 165–174.

[17] YANG Haiyan, LI Fengping, CHEN Shen'en, et al. An inversion of transient electromagnetic data from a conical source[J]. Applied Geophysics, 2018, 15(3/4): 545–555.

[18] YANG Haiyan, CHEN Shen'en, YUE Jianhua, et al. Transient electromagnetic response with a ramp current excitation using conical source[J]. IEEE Access, 2019, 7: 63829–63836.

[19] YANG Haiyan, LI Fengping, YUE Jianhua, et al. Optimal transient electromagnetic inversion of conical field source based on smoke ring theory[J]. Journal of China University of Mining and Technology, 2016, 45(6): 1230–1237. 杨海燕, 李锋平, 岳建华, 等. 基于"烟圈"理论的圆锥型场源瞬变电磁优化反演[J]. 中国矿业大学学报, 2016, 45(6): 1230–1237.

[20] MA Wangpeng. AEMT data collection and inversion[D]. Nanchang: East China University of Technology, 2018. 马王鹏. AEMT数据的采集及反演[D]. 南昌: 东华理工大学, 2018.

[21] YANG Haiyan, DENG Juzhi, ZHANG Hua, et al. Research on full-space apparent resistivity interpretation technique in mine transient electromagnetic method[J]. Chinese Journal of Geophysics, 2010, 53(3): 651–656. 杨海燕, 邓居智, 张华, 等. 矿井瞬变电磁法全空间视电阻率解释方法研究[J]. 地球物理学报, 2010, 53(3): 651–656.



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