Abstract: Continuous conveyor belt mucking system and synchronous lining system are adopted in the construction of West Qinling tunnel on LanzhouChongqing railway. The conflicts between the continuous conveyor belt mucking system and the synchronous lining system are presented and solutions are proposed. Automatic muck branching device is adopted, which achieves smooth muck transfer between the continuous conveyor belt mucking system and the truck transporting system. Automatic belt releasing and withdrawing device is applied in the works, which achieves successful belt releasing and withdrawing. The practice shows that the conveyor belt mucking technology is helpful to the tunneling in terms of economy, continuity, safety, efficiency and working intensity. The paper can provide reference for the development of continuous conveyor belt mucking technology in China.

Key words: West Qinling tunnel, TBM, continuous conveyor belt, mucking system, transferring technology, synchronous lining, muck branching device, belt releasing and withdrawing device