深部高应力软岩硐室注浆加固技术

In order to solve the support difficulty of soft rock chamber in deep mine of Chengjiao Mine, contrapose the geological conditions of substation in south of the second level of Chengjiao Mine, put forward a method to strengthening the chamber by grouting after the wall of roof and side ,and grouting combining with prestressed anchor cable in the floor. The mine pressure observation showed that during reinforcing repair 90 days, the convergence between the two ribs was about 110 mm, the roof falling value was about 80 mm and the floor heave was about 38 mm.The shrinkage of the fracture surface have meet the requirements of the design, the supporting effect is ideal, The continued large deformation of the chamber surrounding rock was effectively controlled and the chamber maintenance could meet the requirements of the mine production.