锚杆系统中不同垫板形式及各参数影响研究

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中图分类号：TU4 文献标识码：A

Abstract： Based on the theory of mechanics， theoretical bearing capacity formulas for flat and bowl shaped pads are established according to the bearing performance of the pad under load. By establishing a three-dimensional numerical model of “pad rock”， the influence of pad form and structural parameters on the bearing performance of the pad under load is analyzed， and the pad form and structural parameters suitable for anchor bolts are selected. The results show that under a load of 300kN ， if a bowl shaped cushion plate is selected for the anchor system， the parameters should be 300mm×300mm× 180mm ， arch height of 35mm ， aperture radius of 34mm ， and bowl bottom radius of 60mm ; If a flat pad is selected， the parameters should be 280mm×280mm×255mm ， with a hole diameter of 26mm and an anchor radius of 64mm . The bowl shaped cushion plate has a better effect on controlling the deformation of surrounding rock under load.

Key words： rockbolting systems; bearing performance; plate form; influencing parameters; numerical simulation

随着我国经济的快速发展，隧道和煤矿巷道的修建数量日趋增多。（剩余10905字）