| 摘要 |
According to the present invention, a method of excavating bedrock includes forming a first hexahedral space inside the bedrock; forming a second hexahedral space in a depth direction of the first hexahedral space; and forming an additional hexahedral space by cutting an adjacent portion from the first hexahedral space. By the present invention, safely excavating the bedrock with only few workers is possible, and a noise generated when excavating the bedrock can be remarkably reduced. Also, a rockfall is prevented at a space formed by the bedrock excavation, and decay due to underground water can be prevented. Also, by extracting hexahedral rocks by the bedrock excavation, the hexahedral rocks can be used for various purposes afterwards. |
