基于新型航空Mobile MT的三维正演分析  

3D Forward Modeling Analysis Based on the New Airborne Mobile MT Method

作　　者：杨开明 罗威 郭长安 王堃鹏[1] 李阳铭 李棂泽 刘银 Yang Kaiming;Luo Wei;Guo Changan;Wang Kunpeng;Li Yangming;Li Lingze;Liu Yin(College of Geophysics,Chengdu University of Technology;China Railway Eryuan Engineering Group Co.,Ltd.;Sichuan Natural Resources Investigation and Design Group Co.,Ltd.;Geophysical Survey Center,China Geological Survey;China Aneng Group Third Engineering Bureau Co.,Ltd.)

机构地区：[1]成都理工大学地球物理学院,成都市610059 [2]中铁二院工程集团有限责任公司,成都市610031 [3]四川省自然资源勘察设计集团有限公司,成都市610051 [4]中国地质调查局地球物理调查中心,河北廊坊065000 [5]中国安能集团第三工程局有限公司,成都市611130

出　　处：《勘察科学技术》2024年第6期16-23,共8页Site Investigation Science and Technology

基　　金：中国博士后科学基金项目(编号:2022M723684);四川省科技计划项目(编号:2022JDRC0066)资助。

摘　　要：近几十年来,地面物探在工程勘探与开发中取得了重大进展,然而地面物探在艰险山区进行勘探时,存在工作效率低、测线设计受地形限制较大等问题。航空物探在空中采集数据的方式在复杂地形条件下愈显优势,可为复杂区域的工程勘探提供新的解决方案。Mobile MT是近年来国际上提出的一种新型的天然源航空电磁法,该方法结合大地电磁法和航空电磁法,采用航空平台测量三分量磁场(H_(x),H_(y),H_(z)),地面布设基站测量水平电场信息(E_(x),E_(y)),以此来推断地电结构。由于实际的大地模型为三维地电模型,因此需要开展Mobile MT三维正演研究,以探寻该方法针对异常地质体的响应特点,为其在实际工作中的数据解译提供理论基础。In recent decades,ground geophysical exploration has made significant advances in engineering exploration and development.However,in challenging mountainous terrains,ground geophysical methods often suffer from low efficiency and limitations in survey line design due to topography.Airborne geophysical methods,which collect data from the air,demonstrate distinct advantages under complex terrain conditions,offering new solutions for engineering exploration in such areas.Mobile MT,a new natural-source airborne electromagnetic method proposed in international field in recent years,combines magnetotelluric method with airborne electromagnetic method.It utilizes an airborne platform to measure three-component magnetic fields(H_(x),H_(y),H_(z))while ground-based stations measure horizontal electric fields(E_(x),E_(y))to infer the earth electrical structure.Given that actual earth models are often 3D earth electrical models,it is essential to conduct 3D forward modeling studies of Mobile MT to explore its response characteristics to anomalous geological bodies,thereby providing a theoretical foundation for data interpretation in practical applications.

关 键 词：Mobile MT 航空电磁 三维正演 COMSOL Multiphysics 三维地电模型 

分 类 号：TN9[电子电信—信息与通信工程]