Talking about the left road processing with roof ripping and unloading pressure;

Application of CD method in the inclined shaft ripping construction of Guanyintang tunnel;

This paper introduces the transitional measures for the transformation of the construction from the loess transverse 6~# tube into the main tunnel, and expounds the steel frame turning construction of transverse tube, the setting up of the gantry at the junction between the transverse tube and the main tunnel, and the ripping construction of the main tunnel.

3 auxiliary incline shaft of Nanliang Tuunel on Shijiazhuang-Taiyuan Special Passenger Railway Line as the example,this paper introduces the construction method adopted in the hard wall-rock for rapidly finishing the ripping construction,guaranteeing the effective control of the over-excavation and less-excavation,and rapidly forming the two-way work capacity in the main tunnel.

Taking the cross cave propping in Hanguguan Tunnel of passengers special line on Zhengxi railway,this paper introduces a new construction technique of propping- vertical propping method.