The surrounding rock of 9300 drift is of plastic soft type. Because of great ground pressure, rock movement and long action duration, the support facilities were destroyed. Although being repaired, they continued to deform,excessive rock movement still posed safety problems.Therefore it was decided that the technology of temporary shotcrete-permanent block-postwall injection was used for repair of a 110m drift.This fully sealed complex structural support, combining stiffness with softness, has many advantages, such as yieldability,ability to bear ground pressure,even distribution of pressure etc. It eliminates defects of traditional support and prospects well.