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该文介绍了瞬变电磁法在井下巷道中应用的基本原理、技术特点、资料处理与解释方法。在巷道迎头超前探测中,首次采用十字型剖面观测系统,观测巷道迎头中心线方向竖直剖面和顺层剖面,克服了井下空间狭小的限制,节省了工作时间,提高了工作效率。现场应用结果表明,该方法在高阻围岩地区的井巷超前预报中,对导水裂隙和断裂破碎带等不良地质体的发育情况具有快速、高效的勘探效果,能为井巷掘进、隧道开挖等地下工程建设的施工和安全提供有效指导。
This paper introduces the basic principles, technical characteristics, data processing and interpretation methods of transient electromagnetic method in underground tunnels. In the forward heading detection of the roadway, the cross-section observation system is firstly adopted to observe the vertical profile and the bedding profile in the heading centerline of the roadway, which overcomes the limitation of the downhole space, saves the working time and improves the work efficiency. The field application results show that this method has a fast and efficient exploration effect on the development of poor geologic bodies such as water-conducting fractures and fractured fractures in the advanced prediction of roadways in the area of high resistivity rocks. It can be used for tunneling, tunneling Excavation and other underground construction of the construction and safety to provide effective guidance.