中文摘要：

工程勘察中,岩溶以及地层脱空给工程安全带来严重安全隐患,应用钻探手段查明此类地质问题代价较大,此时应用经济有效的地球物理技术探测地下地质异常体,可以在节约成本的同时达到解决地质问题的目的。本文首先通过2-D瞬变电磁正演模拟,分析正演模拟结果,然后结合地质钻探结果,分析瞬变电磁法在探测岩溶及地层脱空等地质问题的应用效果。结果表明,瞬变电磁法可以有效地探测岩溶及地层脱空等地质问题,适合作为工程勘察辅助手段加以应用。

英文摘要：

In the engineering investigation,the karst and the void formation will bring the serious hidden safe danger to engineering. The application of drilling methods to verify the kinds of the geological problems will result in the high cost. The application of the economical effective geophysics technology to survey the subsurface geological unusual bodies may save the cost to achieve the solution goal for the geological problems. Through the forward simulation with the 2-D transient electromagnetism in this article,the analogue results are analyzed. Then,combining with the geological drilling results,the application effect of transient electromagnetic method to detect the geological problems such as the karst and the void formation is analyzed. The study results indicate that the transient electromagnetic method may detect the geological problems such as the karst and the void formation effectively,which is suitable for the assistance method application of engineering investigation.