超短时长被动源面波成像在浅地表空洞识别中的应用  

Application of ultra-short-duration passive source surface-wave imaging in identification of shallow surface cavities

作　　者：刘诗钰 王典[1,2] 李正 LIU Shiyu;WANG Dian;LI Zheng(College of Geo-Exploration Science and Technology,Jilin University,Changchun 130026,China;Geological Resources Stereo Exploration Virtual Simulation Experimental Teaching Center,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]吉林大学地质资源立体探测虚拟仿真实验教学中心,长春130026

出　　处：《世界地质》2024年第1期93-101,共9页World Geology

基　　金：吉林省高等教育教学改革研究课题(JLJY202279931583)。

摘　　要：为解决城市物探工作中由于勘探场地的监管限制导致无法进行长时间数据采集工作的问题,笔者使用超短时长被动源噪声数据,通过相位加权叠加互相关函数法提取出频散曲线,并对基阶频散曲线反演得到一维横波速度剖面,以一维横波速度剖面为初始模型反演得到第二阶段反演结果,指示出地下空洞的存在。研究结果表明超短时长被动源面波成像方法在空洞识别方向应用的可行性。To address the challenge of long-duration data collection difficulty in urban geophysical exploration resulted from regulatory restrictions on exploration sites,the authors utilize ultra-short-duration passive source noise data.By employing the phase-weighted stacking of cross-correlation functions,dispersion curves are extracted.The fundamental mode dispersion curves are then inverted to obtain a one-dimensional S-wave velocity profile.Utilizing this profile as an initial model,a second-stage inversion is conducted,which reveals the presence of underground cavities.The results of this study demonstrate the feasibility of using ultra-short-duration passive source surface-wave imaging for cavity detection.

关 键 词：被动源面波勘探 地下空洞 浅层勘探 频散曲线 

分 类 号：P631.1[天文地球—地质矿产勘探]