全空间定点三维瞬变电磁探测技术研究及应用
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摘要
为了使掘进巷道前方和回采工作面内部导含水构造准确定位和直观显示在成果图件中。基于原有的瞬变电磁探测技术设计定点三维超前探测技术,采用三维物理模拟技术,对煤矿中不同空间位置和形态的导含水构造进行模拟研究,分析其三维视电阻率空间分布的规律特征,结果表明:多匝小线圈具有一定的方向性,当收发线圈的法线接近模拟体时,才会产生较明显的瞬变电磁响应信号;不同位置和形态的导含水模型,其视电阻率三维空间等势面范围与其实际体积尺寸基本吻合。在平朔井工一矿19108工作面内部隐伏陷落柱的探测应用中,工作面内部的陷落柱能够在三维异常空间中准确地显示出来,为煤矿巷道掘进和工作面回采前的地质预报提供了有效的技术手段。
In order to accurately locate and intuitively display the water-conducting structures inside the front of the excavation roadway and in the working face in the results map, based on the original fixed-point three-dimensional transient electromagnetic advance detection technology, the three-dimensional physical simulation technology was used to simulate the water-conducting structures in different spatial locations and shapes in coal mines, and the spatial distribution characteristics of three-dimensional apparent resistivity were analyzed. The results show that the multi-turn small coil has certain directionality. When the normal line of the transceiver coil is close to the simulated body, it will produce a more obvious transient electromagnetic response signal; the water-repellent model with different position and shape, the apparent resistivity of the three-dimensional space of equipotential surface area basically coincides with its actual volumetric dimension. In the application of concealed collapse columns inside the working face 19108 of Jinggongyi Mine No. 1 in Pingshuo, the collapse columns inside the working face can be accurately displayed in the three-dimensional anomaly space, providing effective technical means for geological forecast during drivage excavation and before extraction in a working face.
In order to accurately locate and intuitively display the water-conducting structures inside the front of the excavation roadway and in the working face in the results map, based on the original fixed-point three-dimensional transient electromagnetic advance detection technology, the three-dimensional physical simulation technology was used to simulate the water-conducting structures in different spatial locations and shapes in coal mines, and the spatial distribution characteristics of three-dimensional apparent resistivity were analyzed. The results show that the multi-turn small coil has certain directionality. When the normal line of the transceiver coil is close to the simulated body, it will produce a more obvious transient electromagnetic response signal; the water-repellent model with different position and shape, the apparent resistivity of the three-dimensional space of equipotential surface area basically coincides with its actual volumetric dimension. In the application of concealed collapse columns inside the working face 19108 of Jinggongyi Mine No. 1 in Pingshuo, the collapse columns inside the working face can be accurately displayed in the three-dimensional anomaly space, providing effective technical means for geological forecast during drivage excavation and before extraction in a working face.
引文
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[14]李明星,程久龙.矿井瞬变电磁超前探测地质异常三维可视化[J].煤矿安全,2011,11(11):87–91.LI Mingxing,CHENG Jiulong.Mine transient electromagnetic advance detection geologic anomaly 3d visualization[J].Safety in Coal Mines,2011,11(11):87–91.
[15]李貅.瞬变电磁测深的理论与应用[M].西安:陕西科学技术出版社,2002.
[16]蒋宗林,田永华.综合物探技术在陷落柱富水性评价中的应用[J].煤炭科学技术,2015,43(11):139–142,151.JIANG Zonglin,TIAN Yonghua.Integrated geophysical technology applied to watery evaluation of sinkhole[J].Coal Science and Technology,2015,43(11):139–142,151.
[2]刘志新.矿井瞬变电磁场分布规律与应用研究[D].徐州:中国矿业大学,2007.
[3]刘盛东,刘静,岳建华.中国矿井物探技术发展现状和关键问题[J].煤炭学报,2014,39(1):19–25.LIU Shengdong,LIU Jing,YUE Jianhua.Development status and key problems of Chinese mining geophysical technology[J].Journal of China Coal Society,2014,39(1):19–25.
[4]姜志海.巷道掘进工作面瞬变电磁超前探测机理与技术研究[D].徐州:中国矿业大学,2008.
[5]刘树才,岳建华,刘志新.煤矿水文物探技术与应用[M].徐州:中国矿业大学出版社,2005.
[6]程建远,石显新.中国煤炭物探技术的现状与发展[J].地球物理学进展,2013,28(4):2024–2032.CHENG Jianyuan,SHI Xianxin.Current status and development of coal geophysical technology in China[J].Progress of Geophysics,2013,28(4):2024–2032.
[7]姜志海,岳建华,刘树才.多匝重叠小回线装置的矿井瞬变电磁观测系统[J].煤炭学报,2007,32(11):1152–1156.JIANG Zhihai,YUE Jianhua,LIUShucai.Mine transient electromagnetic observation system of small multi-turn coincident configuration[J].Journal of China Coal Society,2007,32(11):1152–1156.
[8]张振勇.TEM技术在岩层富水性探测中的应用[J].煤田地质与勘探,2015,43(6):109–113.ZHANG Zhenyong.Application of TEM technique in detecting the water enrichment of strata[J].Coal Geology&Exploration,2015,43(6):109-113
[9]邢修举,于景邨.煤矿综采面突水水源瞬变电磁探测技术及应用[J].能源与环保,2017,39(1):96–99.XING Xiuju,YU Jingcun.The application of mine transient electromagnetic detection technology on working face water inrush water[J].China Energy and Environmental Protection,2017(1):96–99.
[10]于景邨.矿井瞬变电磁法勘探[M].徐州:中国矿业大学出版社,2007.
[11]于景邨,刘志新.用瞬变电磁法探查综放工作面顶板水体的研究[J].中国矿业大学学报,2007,36(4):542–546.YU Jingcun,LIU Zhixin.Research on full space transient electromagnetic techniquefor water hazard to the roof of caving exploration in coal mines[J].Journal of China University of Mining&Technology,2007,36(4):542–546.
[12]王恩营,刘山清,高荣斌,等.基于瞬变电磁法探究中高阶煤层瓦斯含量与视电阻率关系的试验[J].煤田地质与勘探,2017,45(6):149–153.WANG Enying,LIU Shanqing,GAO Rongbin,et al.Transient electromagnetic exploration-based experiment on the relationship between the level of gas content and apparent resistivity in high rank coal seam[J].Coal Geology&Exploration,2017,45(6):149–153..
[13]杨海燕,岳建华.巷道影响下三维全空间瞬变电磁法响应特征[J].吉林大学学报,2008,38(1):129–134.YANG Haiyan,YUE Jianhua.Three-dimensional full-space transient electromagnetic response characteristics under influence of roadway[J].Journal of Jilin University,2008,38(1):129–134.
[14]李明星,程久龙.矿井瞬变电磁超前探测地质异常三维可视化[J].煤矿安全,2011,11(11):87–91.LI Mingxing,CHENG Jiulong.Mine transient electromagnetic advance detection geologic anomaly 3d visualization[J].Safety in Coal Mines,2011,11(11):87–91.
[15]李貅.瞬变电磁测深的理论与应用[M].西安:陕西科学技术出版社,2002.
[16]蒋宗林,田永华.综合物探技术在陷落柱富水性评价中的应用[J].煤炭科学技术,2015,43(11):139–142,151.JIANG Zonglin,TIAN Yonghua.Integrated geophysical technology applied to watery evaluation of sinkhole[J].Coal Science and Technology,2015,43(11):139–142,151.