摘要
本文重点介绍了由陕西地矿物化探队研发的150 kW大功率电磁发射系统及实践案例,通过室内和野外实际测试给出了系统关键性能指标参数:理论关断时间小于20μs,野外实测关断时间小于1.5 ms;时间域波形基本接近标准波形;频率域波形低频时基本接近标准波形,大电流高频时稳定电流略有波动,波动范围最大为稳定电流的±10%。与目前较为流行的电磁探测系统进行对比,该系统相对于目前主流的电磁法仪器有明显优势,最大输出电压达2000 V,最大输出电流达150 A,既可用于频率域电磁探测,又可用于时间域电磁探测。两个案例说明了该系统具有较为可靠的实用性和有效性,为助力新一轮“找矿突破”提供了一种新的地球物理勘查技术。
This paper focuses on the 150 kW high-power electromagnetic detection system and practical cases developed by Shaanxi Geological and Geochemical Exploration Team.The key performance parameters of the system are given through comprehensive laboratory and field tests:the theoretical turnoff time is less than 20μs,and the field-measured turn-off time is less than 1.5 ms.The time-domain waveform closely approximates standard waveform,and the frequency-domain waveform matches the standard waveform at low frequencies,with slight fluctuations(±10%of stable current)observed at high frequencies,high current conditions.Compared with the other popular electromagnetic detection systems,this system exhibits significant advantages,including a maximum output voltage of 2000 V,a maximum output current of 150 A,and dual-mode compatibility for both frequency-and time-domain electromagnetic detection.Two case studies demonstrate the reliable practicability and effectiveness of this system,thereby offering a novel geophysical exploration technology to advance the"New Phase of Mineral Exploration Breakthrough Strategic Action".
作者
鱼鹏亮
刘建利
李明
赵旭阳
王天龙
卢晓
Yu Pengliang;Liu Jianli;Li Ming;Zhao Xuyang;Wuang Tianlong;Lu Xiao(Geothermal and Geological Party,Tibet Bureau of Mineral Resource Exploration and Development,Lhasa 850032,Xizang,China;Shaanxi Geophysical and Geoehemical Team Co.,Ltd.,Xi'an 710043,Shaanxi,China)
出处
《陕西地质》
2025年第1期53-61,共9页
Geology of Shaanxi
基金
陕西地矿集团科研项目《大功率电磁探测系统方法技术集成研究》(编号KY202220)、《小秦岭巡马道断裂ZK1井中激电及地球物理测井》(编号KY202225)资助。
关键词
地球物理勘查
大功率电磁探测
可控源音频大地电磁测深
井中激电
Geophysical exploration
High-power electromagnetic detection
Controlled-source audiofrequency magnetotellurics
Borehole induced polarization
