Sonic logging for detecting the excavation disturbed and fracture zones
Yen-Ching Lin, CCU National Chung Cheng University, Chiayi City, Taiwan, Young-Fo Chang, National Chung Cheng University, Chiayi County, Taiwan, Jia-Wei Liu, Industrial Technology Research Institute, Green Energy & Environment Research Laboratories, Tainan, Taiwan and Cheng-Wei Tseng, Industrial Technology Research Institute, Hsinchu City, Taiwan
