Abstract: During the construction of deep roadways,due to the influence of three high and one disturbance factors,some broken roadways still suffered large deformation after being supported by Ushaped steel.In order to study the deformation repair scheme of Ushaped steel einforcement in deep roadways,monitoring the roadway displacement by setting monitoring points around the roadway,combining the deformation monitoring results of the field to classify the severity of the Ushaped steel deformation zone,and using the severity classification of the deformation zone to optimize grouting reinforcement Technical parameters,grouting reinforcement for Ushaped steel walls,and bolt stress monitoring of the roadway after grouting reinforcement.The data shows that the anchor stress has basically remained unchanged,and the roadway remains stable and reliable,achieving efficient and rapid excavation for subsequent similar highlands.Accumulated experience in rapid construction of roadway.

Key words: High ground pressure,Ushape steel,Backwall grouting,Parameter optimization