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通过对深井巷道两帮锚固体破坏特征及作用机理分析,锚固体最大破坏部位在两帮偏中上部,两帮锚杆支护的作用就是使锚杆与锚固范围内岩体相互作用形成锚固承载结构体。把深井巷道两帮锚固体失稳分为压裂失稳和剪切失稳,两帮锚固体首先失稳形态为压裂失稳,建立了巷道两帮锚固体2种失稳条件下的稳定性力学模型,提出了锚杆、锚索耦合支护方案,并对试验巷道两帮稳定性进行了力学计算、数值分析及现场观测,回采巷道两帮采用支护设计方案后,两帮收敛量减小,最大移近量124 mm,控制在合理范围内,两帮围岩稳定,支护效果显著。
Through the analysis of the failure characteristics and mechanism of the two groups of anchors in deep tunnel, the maximum damaged part of anchor is in the upper part of the two groups. The function of the two groups of anchors is to make the anchors and the rock mass in the anchorage area form an anchor bearing Structure. The instability of two groups of anchors in deep tunnel is divided into fracturing instability and shear instability. The first instability of the two anchors is fracturing instability, and the stability of the two anchors is established under two instability conditions Mechanics model, a scheme of bolt and anchor cable coupling support is put forward, and mechanical stability, numerical analysis and field observation of the two sides of the roadway are carried out. After the two sides of the roadway are designed with support design, Decrease, and the maximum approaching amount is 124 mm. Within a reasonable range, the two surrounding rocks are stable and the supporting effect is remarkable.