摘要
针对工程物探中常见的地下岩溶探测问题,利用时域有限差分法对几种不同的地下岩溶模型做了钻孔雷达数值模拟,分析了其异常响应特征;在此基础上,利用运动方程的射线层析成像方法进行了波速以及衰减层析成像。结果表明:波速和衰减层析成像对异常的反映比较好,与此同时,它们各有优缺点,需互相参考、配合使用。研究结果可为钻孔雷达层析成像法在地下岩溶探测应用中的数据判读和成果解释提供借鉴和支持。
Aiming at the problems of underground karst detection in engineering geophysical exploration,the FDTD method were used to simulate several different underground karst models using borehole radarand analyzes its abnormal response.On this basis,velocity tomography and attenuation tomography were performed on the karst models.The results show that both velocity tomography and attenuation tomography have have good performance.At the same time,they have their own disadvantages,we need to combine the results of their both.The results is useful for the data interpretation of the borehole radar CT method in underground karst exploration applications.
作者
曾奇
余海忠
孙泽会
Zeng Qi;Yu Haizhong;Sun Zehui(Shenzhen Municipal Design&Research Institute Co.,Ltd,Shenzhen 518000,China)
出处
《城市勘测》
2020年第3期181-187,共7页
Urban Geotechnical Investigation & Surveying
关键词
钻孔雷达
数值模拟
层析成像
岩溶探测
borehole radar
numerical simulation
tomography
karst exploration
