隧道全空间瞬变电磁响应的物理模拟

Physical Simulation of the Transient Electromagnetic Response Throughout a Whole Tunnel

瞬变电磁法已经在隧道超前探水应用中取得了一些成果,但对隧道全空间瞬变电磁效应机理的研究仍然是一个有待深入研究的领域。为此,应用物理模型试验方法对其开展研究,确定物理相似准则,对模型试验的相似材料进行选择;采用自制实验仪器,研究了盐水电导率和盐水浓度与温度的关系;对发射线圈和接收线圈进行了设计和改造,建立了全空间瞬变电磁模型试验平台;并进行了多组试验,试验结果验证了数值模拟结果的正确性。

Though some achievements concerning the transient electromagnetic method for advance water probing in tunnels have been made, further study is needed regarding the transient electromagnetic effect mechanism on a tunnel as a whole. By means of a physical model test, the physical similarity criteria were determined and the similar materi- als were selected. The relationships between brine conductivity, concentration, and temperature were studied using a self-made experimental apparatus. The transmitter and receiver coils were designed and transformed. The model test platform with whole space transient electromagnetic methods was set up, and many groups of tests were conducted that verified the correctness of the numerical simulation results.