顶板锚杆倾角对综放沿空留巷稳定性影响研究

Study of Stability Influence Regulation by Roof Bolt Inclination along Fully-mechanized Coalface with Top-coal Caving

通过大比例尺相似模拟试验台对王庄矿综放沿空留巷进行相似模拟,试验表明:综放沿空留巷在采用传统锚杆设计方案时,巷道破坏严重,锚杆在巷道大变形情况下发生剪切破坏,通过调整顶板锚杆倾角可以改变锚杆的受力状态,有效改善顶板的支护效果,达到围岩稳定、留巷效果好的目的。

By the large scale simulation test bench in Wangzhuang mine GERTCF analogy simulation,experiments show that: GERTCF in the traditional anchor design, roadway damage occurred in the large deformation of roadway, bolt under shear failure, stress state by adjusting the angle can change the anchor bolt the roof, can effectively improve the supporting effect, achieve the stability of surrounding rock, good effect left lane purpose.