深井软岩表面变形随围岩性质变化分析

The analysis of surface deformation of deep soft rock with the rock characteristics

依据理论分析得出的圆形巷道围岩表面变形计算公式,分析了原岩性质对围岩表面变形影响。分析结果表明:随原岩应力增加,不同岩性围岩表面变形增长速率不同,深井软弱围岩表面变形显著;通过注浆法改变围岩性质,提高围岩粘结力和内摩擦角是减少围岩表面变形,保持围岩稳定较为有效的手段。

Based on theory analysis,the deformation formation of surrounding rock in round tunnel was founded and the influence of rock characteristic on surrounding rock deformation was analyzed.The results were drawn that the velocity of different kinds of rock deformation is different,deformation of soft rock is very obvious in deep tunnel.the increasment of cohesion and fraction angle by injecting serosity is main method to control deformation of surrounding rock.