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为提高深部巷道支护围岩体系的安全性,应用FLAC3D软件分析了井下巷道在冲击载荷作用下的速度响应和应力、位移演化规律,以及冲击波在支护围岩体系中的传播及衰减规律.结果表明:冲击波作用下,巷道两边帮最大水平速度达1.6m/s,U型钢支护使巷道整体支撑能力增强,同时减小了巷道变形.通过数值计算研究冲击载荷对巷道稳定性的影响,有助于进一步认识冲击载荷对深部巷道支护围岩体系作用机理.
In order to improve the safety of the deep rock roadway surrounding rock system, FLAC3D software was used to analyze the velocity response, stress and displacement evolution of the underground roadway under shock load, and the propagation and attenuation of the shock wave in the surrounding rock support system. The results show that under shock wave, the maximum horizontal velocity of the two sides of the roadway reaches 1.6m / s, the U-shaped steel supports can enhance the overall supporting capacity of the roadway and reduce the deformation of the roadway.By numerical calculation, the impact of impact load on the roadway stability is studied, Which helps to further understand the mechanism of impact load on the surrounding rock system of deep roadway support.