巨高巷道巷帮稳定机理及支护技术

Laneway's Side Stability Mechanism and Support Technology in Super-high Roadway

以山西某矿5203轨道巷的巨高巷道为研究对象,采用对比分析方法,描述了巨高巷道巷帮水平位移和下沉特征及塑性区的分布特征。通过分析巷帮片帮力学模型、巷帮锚固墙的对深部围岩约束原理、巨高巷道金属支架腿部易产生压杆失稳等,最终采用高强锚杆、带、网、索支护方式加固巷帮并确定了合理支护参数。实践结果表明,巨高巷道巷帮稳定原理适用于巨高巷道巷帮支护。

Taking super-high roadway appeared in 5203 track roadway in a mine of Shanxi as research object.The horizontal displacement,subsidence features and plastic zone distribution characteristics of laneway＇s side in super-high roadway are described with comparison analysis method in this paper.Through analyzing mechanical model of rib spalling,constraint theory of anchor wall of laneway＇s side on deep surrounding rock and pressure bar destabilization of metallic support generated in steel timber leg of super-high roadway,finally,the support form of using high strength bolts,steel strip,anchor net and anchor cable to reinforce laneway＇s side is adopted,and the reasonable supporting parameters are determined.The result of engineering practice proves that the laneway＇s side stabilization theory of super-high roadway is suitable to the laneway＇s side support of super-high roadside.