焦家金矿巷道掘进过程中围岩变形及应力分布演化规律  

Deformation and stress distribution evolution of surrounding rock during the roadway excavation in Jiaojia Gold Mine

作　　者：张旭飞 郭运鸿 王兴亚 郭奇峰 Zhang Xufei;Guo Yunhong;Wang Xingya;Guo Qifeng(Jiaojia Gold Mine,Shandong Gold Mining Industry(Laizhou)Co.,Ltd.;School of Civil and Resources Engineering,University of Science and Technology Beijing)

机构地区：[1]山东黄金矿业(莱州)有限公司焦家金矿 [2]北京科技大学土木与资源工程学院

出　　处：《黄金》2024年第6期1-5,共5页Gold

基　　金：国家重点研发计划项目(2021YFC3001301)。

摘　　要：为解决深部高应力下巷道变形严重及支护困难的问题,以焦家金矿-710 m水平巷道为研究对象,建立Flac3D数值分析模型,模拟分析巷道掘进过程中围岩的扰动响应规律。结果显示:因巷道开采扰动,巷道周边应力得到释放,应力进行重新分布,巷道周边应力集中,应力极值主要在顶板、拱肩及边帮上下两侧,应加强顶板、拱肩及边帮上下两侧支护;距离巷道两倍宽度范围内是支护的重点关注区域;巷道掘进后,周边围岩会出现剪切破坏和张拉破坏。通过对巷道变形和应力分布演化分析,揭示了掘进过程中巷道围岩的变形失稳过程,为支护参数设计和支护时机选择提供了科学依据。To solve the problem of serious deformation and difficult support of the roadway under deep high stress,the research centers on the-710 m horizontal roadway in Jiaojia Gold Mine,establishes Flac 3D numerical model to simulate and analyze the disturbance response law of the surrounding rock during the roadway excavation process.The results show that due to the mining disturbance of the roadway,the stress around the roadway is released.Thus,the stress is redistributed,with the stress around the roadway concentrated,and the stress peaks mainly occurring in the roof,the arch shoulder,and the upper and lower sides of the side walls,so the support should be strengthened in the roof,the arch shoulder,and the upper and lower sides of the side walls;within a range twice the width of the roadway is the focus area for support;after excavation,surrounding rock mass will experience shear and tensile failure.By analyzing the evolution of deformation and stress distribution in the roadway,the process of deformation failure of surrounding rock during excavation is revealed,providing a scientific basis for support parameter design and support timing.

关 键 词：深部开采 高应力 围岩变形 应力分布 巷道掘进 

分 类 号：TD32[矿业工程—矿井建设]