Bolt and Grouting Combined Support Technology Applied to Floor Heave Roadway in Deep Mine Soft Rock

In order to solve the difficult control problem of the floor heave occurred in the deep soft rock roadway,a grouting bolt and anchor bolt grouting combined support plan was provided to effectively control the floor heave occurred in the deep soft rock roadway.According to the actual support effect of the bolt and grouting co mbined support in the railway rise of the South Mining Block of Jinlong Mine,a reversed complex arch floor grouting structure was provided.The stability of the structure body was analyzed.The results showed that after the bolt and grouting completed in the roadway,the average convergence between the two sidewalls was only 35.5 m m,the average floor heave was only 45.5 mm and there was no variation of the roof subsidence. The bolt and grouting combined support technology could effectively im prove the rock strength of the deep soft rock roadway,improve the mechanics performances and structures of the surrounding rock,increase the integrated loading capa city of the surrounding rock and effectively control the floor heave of the deep soft rock roadway.