瞬变电磁法在井巷掘进超前预报中的应用

Application of Transient Electromagnetic Method for Advanced Prediction in Well Lane Excavation

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 article introduces the basic principles,technical features,data processing and interpretation methods of transient electromagnetic method when it is used in well lane excavation. In the advanced detection of tunnel head,the cruciform bisect observation system is adopted to observe the vertical section and the bedding section in the direction of central line of the roadway head. This system overcomes the limitation of narrow underground space,it saves the working time and improves the working efficiency.The in-situ application shows that the method which is used in advanced prediction in well lane excavation of high- resistivity surrounding rock zone has the quick and effective detecting effect,for the developmental state of the unfavorable geological bodies including water flowing fracture and shattered fault zone.It can provide effective guidance for the construction and safety of underground engineering such as well lane excavation and tunnel excavation.