井中等值反磁通瞬变电磁法原理及应用  

Principle and application of opposing coils transient electromagnetic method in tunnel

作　　者：李祖强 席振铢 芦磊[3] 胡明杰 周赢 侯海涛 龙霞 LI ZuQiang;XI ZhenZhu;LU Lei;HU MingJie;ZHOU Ying;HOU HaiTao;LONG Xia(Hunan 5D Geophyson Co.,Ltd.,Changsha 410083,China;School of Geoscience and Info-physics,Central South University,Changsha 410083,China;Yunnan Tin Company Limited,Gejiu 661000,China;Yunnan Tin Honghe Resources Co.,Ltd.,Gejiu 661000,China)

机构地区：[1]湖南五维地质科技有限公司,长沙410083 [2]中南大学地球科学与信息物理学院,长沙410083 [3]云南锡业股份有限公司,个旧661000 [4]云锡红河资源有限责任公司,个旧661000

出　　处：《地球物理学进展》2024年第4期1512-1519,共8页Progress in Geophysics

摘　　要：随着矿山近地表资源开采殆尽,地下深部空间成为探矿工作的重点区域.目前,常规地表物探方法无法同时满足矿山深部找矿探测深度与精度的要求.因此,将精度高的物探方法移至井中进行井中物探是解决该问题的重要手段.本文通过理论与物理实验论述了在井中实施等值反磁通瞬变电磁法的可行性.首先,介绍了等值反磁通瞬变电磁法在井中的测量方式,分析了该方法测量的物理原理,推导了该方法在全空间环境下的理论计算公式,并对该方法测量过程中的响应信号进行了分析.然后,通过物理实验进一步验证该方法在井中全空间环境测量的可行性,并对响应信号进行了分析.最后,以云南省个旧市某矿区井中勘探工作案例来分析该方法的有效性.通过将物探成果与已知地质资料的对比,表明该方法在井中应用时能有效的探明矿体、构造等地质异常的位置及空间分布情况.With the depletion of near surface resources in mines,deep underground space has become a key area for exploration work.At present,conventional surface geophysical methods cannot meet the requirements of both depth and accuracy for deep mining exploration.Therefore,moving high-precision geophysical methods to the well for geophysical exploration is an important means to solve this problem.This article discusses the feasibility of implementing equivalent anti magnetic flux transient electromagnetic method in wells through theoretical and physical experiments.Firstly,the measurement method of equivalent anti magnetic flux transient electromagnetic method in wells was introduced,and the physical principle of this method was analyzed.The theoretical calculation formula of this method in a full space environment was derived,and the response signal during the measurement process of this method was analyzed.Then,the feasibility of this method in measuring the full space environment of the well was further verified through physical experiments,and the response signal was analyzed.Finally,the effectiveness of this method is analyzed through a case study of well exploration work in a mining area in Gejiu City,Yunnan Province.By comparing the geophysical results with known geological data,it is shown that this method can effectively detect the location and spatial distribution of geological anomalies such as ore bodies and structures when applied in wells.

关 键 词：等值反磁通瞬变电磁法 井中物探 金属矿 地质构造 

分 类 号：P631[天文地球—地质矿产勘探]