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针对玻璃钢锚杆锚固系统中托盘受损破坏以致锚固失效的现象,利用材料力学对其进行受力分析,同时利用有限元软件ANSYS的静力分析模块对托盘受力进行仿真模拟分析。结果表明:托盘发生破裂或破碎,主要是因为边缘变形量过大,引起切向拉破坏使托盘产生破裂,破裂向托盘中心延伸进而引起整个托盘破碎失效。数值模拟结果与理论推导的结论相吻合,通过对山西段王煤矿150405工作面回风巷玻璃钢锚杆支护失效情况的统计,也验证了理论分析与数值模拟结论的正确性。在此基础上,提出固定轴向载荷作用下托盘更为合理的结构模型。
Aiming at the phenomenon of the failure of the pallet in the anchorage system of FRP anchorage system and the failure of anchorage, the force analysis of the pallet is carried out by using the material mechanics. At the same time, the finite element software ANSYS static analysis module is used to simulate the force of the pallet. The results show that the tray is broken or broken mainly because the edge deformation is too large, which causes the tangential pull failure to rupture the tray. The crack extends to the center of the tray and causes the failure of the entire tray. The numerical simulation results are in good agreement with the theoretical ones. Based on the statistical analysis of FRP bolt support failure in 150405 working face of Shanxi Duanwang Coal Mine, the correctness of theoretical analysis and numerical simulation are also verified. On this basis, a more reasonable structural model of the pallet under the action of axial load is proposed.