Analysis of Stability and Required Offset with Vibration Velocity Considering Conditions of Bedrock and Explosive Charges Using the TBM and NATM Extension Blasting Method. - Kong, Suk-Min; Kim, Ah-Ram; Byun, Yoseph; Shim, Seungbo; Choi, Sang-Il; Lee, Seong-Won (Applied Sciences (2076-3417), 2022)