Design and Practices on Concrete Pouring Technology of Cross- Cut Gateway

According to the serious convergence and deformation problems of the roof and floor and the two sidewalls in and along the-650 m railway cross-cut gat eway in Linnancang Mine, the deformation mechanism of the surrounding rock in the gateway was analyzed.It was found that the major features of the gateway were m ulti layers of kaolin base soft rock passed, joint crack development, complicated structure, deep buried depth and gateway deformation with large deformation of broken soft rock under the high stress.Based on the circumstances, a support plan with full cross section concrete pouring was provided.The project monitoring and measuring and the application effects showed that after the support system completed, the convergence of the two sidewalls in the gateway was less than 300 mm and the conver gences of the roof and floor were less than 100 mm. The surrounding rock deformation of the gateway was basically controlled, the stress of the anchored zone was sta ble and the gateway was quickly reached stable in whole.