论文部分内容阅读
软岩复合顶板高应力巷道围岩强度低,应力高,加上侧压大、结构松散,变形量大并持续变形,难支护,用工字钢棚和普通锚杆支护之所以变形严重就是由于支护体的特性和围岩的变形力学特性不耦合造成的。采用组合锚杆和小孔径预应力锚索支护顶板,在巷帮采用锚索加强支护,不仅提高了巷道的围岩强度,也最大限度的发挥了围岩的承载能力,控制了围岩的进一步变形,促成了巷道的稳定。
Soft rock compound roof high stress roadway surrounding rock strength is low, high stress, coupled with large lateral pressure, loose structure, large deformation and continued deformation, difficult to support, with I-beam shed and ordinary bolt support the reason that deformation is serious Due to the nature of the support body and deformation of the surrounding rock mechanical properties are not coupled. The combination of anchor bolt and small-diameter prestressed anchor cable support roof, the use of the anchor to help strengthen the support, not only improve the surrounding rock strength of the roadway, but also to maximize the bearing capacity of the surrounding rock, control of the surrounding rock The further deformation, contributed to the stability of the roadway.