| 坑(井)-地多参数电磁接收系统 |
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| 引用本文： | 陈凯,金胜,魏文博,邓明,叶高峰.坑(井)-地多参数电磁接收系统[J].地球物理学报,2019,62(10):3803-3818. |
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| 作者姓名： | 陈凯 金胜 魏文博 邓明 叶高峰 |
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| 作者单位： | 1. 中国地质大学(北京)地球物理与信息技术学院, 北京 100083;2. 地下信息探测技术与仪器教育部重点实验室, 北京 100083 |
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| 基金项目： | 国家高技术研究发展计划（863计划）重大项目"深部矿产资源探测技术"第03课题（2014AA06A603）资助. |
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| 摘 要： | 坑（井）-地多参数电磁接收系统在地面、坑道、井中三维空间观测天然场源及人工源电磁信号，观测装置接近或穿过矿体，借助动源、大功率发射可获得更加明显的异常值，旨在加大探测深度的基础上提高深部分辨率，同时获取电阻率、极化率、复阻抗等参数.为坑（井）-地电磁成像方法现场数据采集提供硬件设备支持，针对坑道、井中电磁观测的特殊需求，开发了由不极化电极、非接触电极、小型感应式线圈、微型三分量音频磁传感器、地面-坑道电磁接收机、井中电磁接收机等组成的坑（井）-地多参数电磁接收系统，解决了传统不极化电极坑道硬岩表面接地困难和传统感应式磁传感器难以适应坑道狭窄空间的问题；通过多层次的室内、弱干扰条件下野外测试验证了接收系统的各项技术指标，接收机通道全频段噪声水平接近10 nV/rt（Hz），微型三分量音频磁传感器体积压缩至32 cm×32 cm×32 cm；强干扰条件下的矿山试验验证了接收系统的可靠性、适用性及先进性.
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| 关 键 词： | 坑(井)-地电磁探测技术 多参数电磁接收机 非接触电极 微型三分量音频磁传感器 坑道电磁观测 |
| 收稿时间： | 2018-07-05 |
Surface tunnel borehole multi-parameter EM receiver |
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| CHEN Kai,JIN Sheng,WEI WenBo,DENG Ming,YE GaoFeng.Surface tunnel borehole multi-parameter EM receiver[J].Chinese Journal of Geophysics,2019,62(10):3803-3818. |
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| Authors: | CHEN Kai JIN Sheng WEI WenBo DENG Ming YE GaoFeng |
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| Institution: | 1. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China;2. Key Laboratory of Geo-detection, Ministry of Education, Beijing 100083, China |
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| Abstract: | The surface tunnel borehole multi-parameter electromagnetic receiver observes the electromagnetic signals of natural and artificial sources in three-dimensional space on the surface, tunnel and borehole. The instrument approaches or passes through the ore body. Due to dynamic source and high power, more obvious abnormal values can be measured. The purpose is to improve the deep resolution and increase the detection depth, and to obtain resistivity, polarizability, complex impedance and other parameters at the same time. In order to provide hardware support for field data acquisition of surface tunnel borehole electromagnetic imaging method, aiming at the special needs of electromagnetic observation in tunnel and borehole, a surface tunnel borehole multi-parameter electromagnetic receiver composed of non-polarized electrode, non-contacted electrode, small induction coil, micro three-axis audio frequency induction coil, surface tunnel electromagnetic receiver and borehole electromagnetic receiver are developed. The instrument solves the difficulties of grounding the hard rock surface of the traditional non-polarized electrode tunnel and adapting the traditional induction coil to the narrow space of the tunnel. The technical specifications of the instrument are verified by field experiment under multi-level indoor and weak noise field conditions. The noise level of the whole frequency band of the receiver channel is close to 10 nV/rt (Hz), and the volume of the compact three-component audio magnetic sensor is compressed to 32 cm×32 cm×32 cm. The reliability, applicability and advancement of the instrument are verified by mine experiment under strong noise conditions. |
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| Keywords: | Surface tunnel borehole electromagnetic prospecting Multi-parameter electromagnetic receiver Non-contacted electrode Micro three-axis audio frequency induction coil Tunnel electromagnetic field measurement |
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