瞬变电磁三维成像在煤矿含水体探测中的应用  

Application of TEM 3D Imaging in Water Content Detection of Coal Mine

作　　者：晏雁 Yan Yan(Hubei Coal Geological Geophysical Survey Team,Wuhan Hubei 430200,China)

机构地区：[1]湖北煤炭地质物探测量队,湖北武汉430200

出　　处：《工程地球物理学报》2023年第1期43-49,共7页Chinese Journal of Engineering Geophysics

基　　金：中国煤炭地质总局科技项目(编号:ZMKJ-2022-JBGS01-3)。

摘　　要：瞬变电磁法探测技术是目前煤矿含水体探测的首选方法,目前瞬变电磁常用的解释手段为一维正反演、二维成果图显示,在描述三维空间地质信息方面略显不足。本文以新疆哈密某煤矿含水体探测项目数据为例,为了能够更加准确地了解地下介质的电性结构,多角度、多方位地显示地下含水体三维空间特征,通过坐标转换,将深度—视电阻率数据转换到三维空间坐标系下,利用三维可视化软件进行三维离散数据网格化,制作了瞬变电磁三维可视化成像模型、含水体三维可视化模型、三维切片等。结果表明,利用瞬变电磁三维成像能够清晰、直观地显示含水体异常在立体空间上的范围及空间位置形态,亦可以清晰地显示二维剖面难以发现的含水构造,有利于对地下含水体赋存状态、连通情况、补给通道等要素的综合分析。TEM is one of the most favorable methods for detecting water bearing bodies in coal mines.At present,the conventional interpretation methods of TEM are one-dimensional forward inversion and two-dimensional result map display,which are slightly inadequate in describing three-dimensional spatial geological information.In this paper,in order to more accurately understand the electrical structure of the underground medium,display the three-dimensional spatial characteristics of the aquifer from multiple perspectives,taking the data of a water bearing exploration project in a coal mine in Hami,Xinjiang,as an example,3D visualization software is used to grid the three-dimensional discrete data.The depth-apparent resistivity data is first converted to the 3D spatial coordinate system through coordinate conversion,then a 3D visualization imaging model of transient electromagnetic is created,finally a 3D visualization model and a 3D slice of aquifer are made.The results show that the use of transient electromagnetic 3D imaging can clearly and intuitively display the scope and spatial position of aquifer anomalies in 3D space,and also clearly display the water-bearing structure that are difficult to find in 2D sections,which is conducive to the comprehensive analysis of such elements as the occurrence state,connectivity,and supply channels of underground aquifer.

关 键 词：瞬变电磁 三维成像 含水体 含水构造 

分 类 号：TD74[矿业工程—矿井通风与安全] P631.325[天文地球—地质矿产勘探]