Abstract: The entrance section of Zhongtianshan tunnel on TurpanKorla railway in South Xinjiang passes through jointdenselydeveloped granite rock mass. In order to ensure the safe and successful boring of the TBM, advance selfdrilling bolts are installed through the cutterhead of the TBM, new type of polyurethane chemical grout is injected through the bolts and radial grouting is executed after the rock mass leaves the shield. In this way, the deformation and collapse of the rock mass have been brought under effective control and the availability of the equipment is improved. In the end, the TBM passes through the jointdenselydeveloped granite rock mass safely and efficiently. 

Key words: open TBM, jointdenselydeveloped section, polyurethane grout, advance selfdrilling bolt, radial grouting