关键词: 软岩巷道, 底鼓变形, 变形力学机制, 围岩控制, 巷道支护

Abstract: To solve large floor drum up deep soft rock roadways deformation control problem, in view of the large coal mine 0908 transport of roadway floor drum up serious damage phenomena, through the theoretical analysis of indoor experiment, numerical simulation and industrial test on the site, determine the failure mechanism of roadway ,and based on the optimal scheme, floor drum up integrated prevention control countermeasures are put forward. The results show that the surrounding rock of 0908 transportation roadway is affected by the low strength of engineering rock mass, the joints fractured and high concentration stress by mining ,the overall shows the large deformation failure characteristics of soft rock,which including severe heave, large floor heave and large wall shrinkage. According to the analysis, the surrounding rock of roadway is ⅠABⅡABDⅢABC composite deformation mechanical mechanism, and the integrated control strategy for floor heave prevention is put forward, which transforms the composite into ⅡB stable deformation mechanical mechanism. Field application results show that floor heave failure is effectively controlled, the deformation of floor is less than 97mm, and the maximum deformation of surrounding rock is less than 120mm. The research results provide reference for the research of floor heave failure mechanism and control countermeasures of similar deep buried soft rock roadway.