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该文主要介绍了瞬变电磁法的原理和其在隧洞中应用与地面应用的不同之处及改进现状。通过西北某引水隧洞超前地质预报应用实例,肯定了瞬变电磁法在超前地质预报中的技术优势,但也指出了金属干扰和异常位置精度仍是其今后需继续改善的地方。
This paper mainly introduces the principle of transient electromagnetic method and its application in the tunnel and the difference between the ground application and improvement of the status quo. Through the application example of advanced geological forecasting of a diversion tunnel in the northwest of the country, the technical advantages of transient electromagnetic method in advanced geological prediction are affirmed. However, it is pointed out that the precision of metal disturbance and abnormal position is still the place where it needs to be further improved.