【摘要】 通过对朱仙庄矿Ⅱ5行人上山破碎带软岩巷道变形破坏特征的分析,指出巷道失稳变形剧烈的原因在于普通的U型钢可缩支架较低的工作阻力不能很好地阻止围岩进入失稳蠕变阶段。根据二次支护原理,提出采用超高强度型钢支架来控制围岩的这种流变特性。更多还原

【Abstract】 Taking No.Ⅱ 5 person rise roadway in Zhuxianzhuang Mine as an example,the characteristics of deformation and failure in the broken soft rock roadway are analyzed.It is pointed out that the intense deformation of tunnel instability is due to ordinary contractible U-shaped steel supports the work of lower-resistance are not well to block access to unstable rock creep stage.According to the secondary support principle,a new support method is proposed,the ultra-high strength steel supports is used to control the rheological properties of this rock.更多还原