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地-井瞬变电磁法是在地面发射,井(钻孔)中接收的装置形式,能够利用已有钻孔使接收探头深入地下更加接近矿体,获得更加可靠的目标体信息.文中针对复杂地形地区矿区深部找矿面临的实际问题,提出了电性源地-井瞬变电磁法的思路,并以FDTD正演模拟来研究均匀半空间瞬变场的空间分布以及一维、三维模型钻孔中的三分量瞬变响应特征,以期获得理论模型三分量响应特征规律,为实际勘查提供参考.理论模型计算结果表明,电性源地-井TEM方法三分量瞬变响应曲线对于电性界面、异常体具有良好的反应.
Ground-well transient electromagnetic method is a form of device that is received in ground launch and well (borehole), which can make the receiving probe deeper underground to get closer to the ore body with the existing drilling to obtain more reliable target body information. This paper presents the idea of electrical source-well transient electromagnetic method and studies the spatial distribution of the uniform half-space transient field by FDTD forward modeling as well as one-dimensional and three-dimensional model drilling Hole in the three-component transient response characteristics in order to obtain the theoretical model of the three-component response characteristics of the law for the actual exploration provides a reference.The theoretical model results show that the electrical source-well TEM method three component transient response curve for the electrical interface , Abnormal body has a good response.