Deformation characteristics of surrounding rocks in dynamically-pressured soft rock roadway and comprehensive management practice

With the continuous development of coal resources,the supporting problems of soft rock roadway has seriously affected the safe production of the coal mine enterprises.Aiming at the complex engineering characteristics of soft rock and dynamic pressure of rail rise,from the physical and mechanical properties of surrounding rock of the test section roadway,the time effect characteristic of displacement development of surrounding rock and the characteristics of loose circle after mining,the reasons of the instability failure of the roadway were analyzed.The studies show that changing the mechanical property and the bearing capacity of surrounding rock,improving the strength of support system and making the surrounding rock and support common loading is a effective way to control dynamically-pressured soft rock roadway.This paper proposes shotcrete-bolt-floor anchor-full face grouting combined support technology,and has the industrial test with the optimized support parameters.The test results show that,the deformation and the stabilization time of soft rock roadway is short,the rock crushing range is small and the repair rate is low after mining.