Research on karst cavity detection method based on multi-frequency borehole sonar

WANG Jin-chao, WANG Chuan-ying, TANG Xin-jian, HAN Zeng-qiang, WANG Yi-teng, HU Sheng

Rock and Soil Mechanics . 2020, (1): 353 -360 . DOI: 10.16285/j.rsm.2018.7340