全空间定点三维瞬变电磁探测技术研究及应用  

Three-dimensional transient electromagnetic detection technology of fixed point in full space

作　　者：邢修举 蒋齐平 吴正飞 李文刚 张倚瑞 XING Xiuju;JIANG Qiping;WU Zhengfei;LI Wengang;ZHANG Yirui(Xi’an Research Institute Co.Ltd.,China Coal Technology and Engineering Group Corp.,Xi’an 710077,China)

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《煤田地质与勘探》2018年第A01期60-65,共6页Coal Geology & Exploration

基　　金：国家自然科学基金项目(NSFC41674133);中煤科工集团西安研究院有限公司科技创新基金项目(2018XAYQN11)~~

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.

关 键 词：瞬变电磁法 定点三维探测技术 物理模拟 隐伏陷落柱 

分 类 号：P631[天文地球—地质矿产勘探]