Research On The Best Supporting Time Of Roadway With Broken And Soft Surrounding Rock In High Stress

In order to research the best supporting time of each step in Sub-step supporting method used in deep rock roadway with broken and soft surrounding rock and high stress, this article raised the minimum surface displacement rate of convergence method by analyzing monitoring data basing on the engineering background of level -575m south wing mining area belt conveyor roadway of Gubei Coalmine, Huainan mining area. The best time of operating anchor cable in permanent supporting was ascertained accurately by that methord, and that method has been successfully used in the south wing mining area belt conveyor roadway of Gubei Coalmine. The study results presented can be adopted in the similar engineering.