Coal Geology & Exploration


In order to realize the effective detection of electric field focusing depth and deflection angle scanning of focusing multipoint current sources in coal mine roadway, and accurately grasp its variation, according to the advanced scanning detection mechanism, Gauss theorem and two different methods were used to solve the integration process and derive the electric field line equation of a uniformly charged linear electrode with finite length. The electric field line equation of coplanar multi-electrode layout is induced and deduced through using its spatial distribution symmetry. By changing focusing shielding current ratio coefficient, this paper calculates the boundary line equation of effective detection electric field lines and analyzed the variation of average current density and spatial angle. The lower boundary angle and the deflection angle variations of the electric field boundary line were analyzed through changing simultaneously focusing and deflection shielding current ratio coefficients. The range of emission current intensity of the main electrode and the constrained electrode for advanced scanning detection was determined. This research will provide a technical guidance for the electric survey of focusing multipoint current sources in the field, and is of great significance for improving the exploration mechanism of focusing electric method and promoting the development of geophysical theory.


focusing multipoint current sources, electric field lines, focusing effect, deflection effect, control strategy for advanced scanning detection




[1] 韩德品,李丹,程久龙,等. 超前探测灾害性含导水地质构造的直流电法[J]. 煤炭学报,2010,35(4):635-639. HAN Depin,LI Dan,CHENG Jiulong,et al. DC method of advanced detecting disastrous water-conducting or water-bearing geological structures along same layer[J]. Journal of China Coal Society,2010,35(4):635-639.

[2] 程久龙,李飞,彭苏萍,等.矿井巷道地球物理方法超前探测研究进展与展望[J]. 煤炭学报,2014,39(8):1742-1750. CHENG Jiulong,LI Fei,PENG Suping,et al. Research progress and development direction on advanced detection in mine roadway working face using geophysical methods[J]. Journal of China Coal Society,2014,39(8):1742-1750.

[3] 鲁晶津,吴小平. 巷道直流电阻率法超前探测三维数值模拟[J]. 煤田地质与勘探,2013,41(6):83-86. LU Jingjin,WU Xiaoping. 3D numerical modeling of tunnel DC resistivity for in-advance detection[J]. Coal Geology & Exploration,2013,41(6):83-86.

[4] ROY A,APPARO A. Depth of investigation in direct current methods[J]. Geophysics,1971,36(5):943-959.

[5] GUPTA R N,HATTACHARYA P K. Unipole method of electrical profiling[J]. Geophysics,1963,28(4):608-616.

[6] PANISSOD C,LAJARTHE M,TABBAGH A. Potential fo-cusing:A new multi-electrode array concept,simulation study and field tests in archaeological prospecting[J]. Journal of Applied Geophysics,1997,38(1):1-23.

[7] 阮百尧,邓小康,刘海飞,等.坑道直流电阻率超前聚焦探测的影响因素及最佳观测方式[J].地球物理学进展,2010,25(4):1380-1386. RUAN Baiyao,DENG Xiaokang,LIU Haifei,et al. Influential factors and optimum survey method of advanced focus detection with DC resistivity in tunnels[J].Progress in Geophysics,2010,25(4):1380-1386.

[8] 张力,阮百尧,吕玉增,等. 坑道全空间直流聚焦超前探测模拟研究[J]. 地球物理学报,2011,54(4):1130-1139. ZHANG Li,RUAN Baiyao,LYU Yuzeng,et al. Study of full-space numerical modeling of advanced exploration in tunnel with DC focus resistivity method[J]. Chinese Journal of Geophysics,2011,54(4):1130-1139.

[9] DENG Xiaokang,LIU Jianxin,LIU Haifei,et al. 3D finite element numerical simulation of advanced detection in roadway for DC focus method[J]. Transactions of Nonferrous Metals Society of China,2013,23(7):2187-2193.

[10] GEOHYDRAULIK Data. Beam presentation[Z/OL]. Kirchvers:Geohydraulik Data Corp.,2004. http://www.geoexplorationtechnologies.de/.

[11] 高振宅. BEAM地质超前预报系统在锦屏引水隧洞TBM施工中的应用[J]. 铁道建筑技术,2009(11):65-67. GAO Zhenzhai. The application of the BEAM geological ad-vance prediction system for the TBM construction of the Jinping diversion tunnel[J]. Railway Construction Technology,2009(11):65-67.

[12] 刘志民,刘希高,张金涛,等. 交流聚焦激电法煤巷超前探测阻容试验模拟[J]. 煤炭学报,2015,40(9):2144-2151. LIU Zhimin,LIU Xigao,ZHANG Jintao,et al. Experimental simulation of resistance-capacitance model for advanced detection in coal roadway based on alternating current focusing induced polarization method[J]. Journal of China Coal Society,2015,40(9):2144-2151.

[13] 张金涛,吕一鸣,刘志民,等. 聚焦双频激电法超前探水激励信号发送系统设计[J]. 煤炭科学技术,2015,43(8):107-111. ZHANG Jintao,LYU Yiming,LIU Zhimin,et al. Design on advanced water detection excitation signal transmission system of focusing double frequency induced polarization method[J]. Coal Science and Technology,2015,43(8):107-111.

[14] 汤井田,戴前伟,柳建新,等. 何继善教授从事地球物理工作60周年学术成就回顾[J]. 中国有色金属学报,2013,23(9):2323-2339. TANG Jingtian,DAI Qianwei,LIU Jianxin,et al. Academic achievements of Professor HE Jishan dedicated to geophysics for six decades[J]. The Chinese Journal of Nonferrous Metals,2013,23(9):2323-2339.

[15] 王爱霞,高国棉,周九茹. 有限长均匀带电直线电场的对称性分析与计算[J]. 大学物理,2015,34(10):17-19. WANG Aixia,GAO Guomian,ZHOU Jiuru. Calculation and symmetrical analysis of electric field of a finite line with even charge[J]. College Physics,2015,34(10):17-19.

[16] 刘志民,韩雷,张伟杰,等. 煤巷多点电流源双频激电法超前扫描探测技术[J]. 煤田地质与勘探,2017,45(4):149-156. LIU Zhimin,HAN Lei,ZHANG Weijie,et al. Study on advanced scanning detection technology of dual-frequency induced polarization method with multi-point current sources in coal mine roadway[J]. Coal Geology & Exploration,2017,45(4):149-156.

[17] 廖仁忻,徐志和. 用高斯定理求解电力线方程[J]. 大学物理,1993,12(7):14-15. LIAO Renxin,XU Zhihe. Solving the power line equation with Gauss theorem[J]. College Physics,1993,12(7):14-15.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.