瞬变电磁烟圈反演及层状模型反演在隧道建设探测效果中的对比

针对隧道超前预报瞬变电磁法2种快速反演解译方法(烟圈反演及层状模型反演),从反演理论及实际应用效果对二者进行了对比分析。结果表明:1)烟圈反演盲区较大,等值线存在交叉现象,对小异常分辨较好,适用于任何地层结构;2)层状模型法反演盲区较小,浅部分辨率较好,等值线平滑程度高,易淹没小异常,适用于层状均一地层结构。

Comparison of Transient Electromagnetic Smoke Circle Inversion and Layered Model Inversion in the Detection Effect of Tunnel Construction

Two fast inversion and interpretation methods( smoke circle inversion and layered model inversion) of TEM of tunnel prediction are compared and analyzed from the inversion theory and practical application results. The results show that: 1) for smoke circle inversion,the blind area is large,the isolines cross,the resolution of small anomaly is good,and it is suitable for any stratigraphic structure;2)for layered model inversion,the blind area is small,the resolution of shallow part is good,the isoline is smooth and easy to submerge small anomaly,and it is suitable for layered uniform stratigraphic structure.