复杂地形条件下瞬变电磁法中心回线装置发射线框大小选取研究  

Study on the Size Selection of Transmitting Wire Frame of TEM Central Loop Device under Complex Terrain Conditions

作　　者：宋伟 邓刘洋 Song Wei;Deng Liuyang(Chongqing Research Institute CCTEG,Chongqing 400037,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《工程地球物理学报》2020年第6期768-774,共7页Chinese Journal of Engineering Geophysics

基　　金：中煤科工集团重庆研究院有限公司重点项目(编号:2019ZDXM05)。

摘　　要：发射线框大小选取是瞬变电磁法TEM(Time domain Electromagnetic Methods)中心回线装置设计中的一个重要问题,特别是在地形复杂地区,由于地形起伏较大,目标体的埋藏深度变化范围也较大,采用某一固定大小的发射线框无法满足探测要求,需要综合考虑盲区、最大勘探深度等因素,在不同埋设范围内采用不同大小的发射线框。以山西某矿复杂地形条件下采空积水区探测为例,在分析盲区和最大探测深度的影响因素上,初步选取多组大小不同发射线框,然后进行现场试验,将试验结果与钻孔资料进行对比,最终确定了合适的发射线框大小。The size selection of the transmitting wire frame is an important problem in the design of TEM central loop device,especially in the area with complex terrain.Because of the large topographic relief and the large variation range of burial depth of the target body,the use of a fixed-size launch transmitting wire frame can not meet the detection requirements.It is necessary to consider the blind area,the maximum exploration depth and other factors comprehensively,and adopt transmitting launch wire frames with different sizes in different burial ranges.Taking the detection of water-logged gob area in a mine in Shanxi province as an example,on the basis of analyzing the influencing factors of blind area and maximum detection depth,this paper has preliminarily selected a number of launch wire frames with different sizes,carried out field tests and compared the test results with the drilling data,determining the appropriate size of transmitting wire frames.

关 键 词：复杂地形 瞬变电磁法 中心回线装置 发射线框大小 

分 类 号：P631.3[天文地球—地质矿产勘探]