瞬变电磁法二维正演数值模拟及在工程勘察中的应用效果分析  

Two-dimension numerical simulation with transient electromagnetic method and effect analysis on the application in engineering investigation

作　　者：谭新平 徐志敏[1,2] 辛会翠[3] 李晋[2,4] 

机构地区：[1]西北综合勘察设计研究院,西安710003 [2]中南大学地球科学与信息物理学院,长沙410083 [3]陕西能源职业技术学院,陕西咸阳712000 [4]湖南师范大学物理与信息科学学院,长沙410081

出　　处：《工程勘察》2016年第7期68-75,共8页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(41404111);湖南省自然科学基金(2015JJ3088)资助

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。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.

关 键 词：瞬变电磁法 二维正演 工程勘察 

分 类 号：P631[天文地球—地质矿产勘探]