抄録
Newly developed mobile tunneller (MM130R), incorporating both the power of hard rock excavation of the TBM and the mobility of the roadheader, has been firstly applied to the hard rock excavation of Takatoriyama tunnel project in Rokko mountain area. In this project, the study on the tunnel stability considering the spherical face effect has been carried out by numerical analysis using FEM and field measurement of loosen zone ahead of tunnel face using seismic prospecting. Then the rational support system has been proposed and its effectiveness has been validated by comprehensive observational method at in-situ. These results will be useful for the next tunnel projects in the near future.
