巷道与断层破碎带间距对岩体稳定性影响分析  

Analysis of the influence of distance between roadway and fault fracture zone on rock mass stability

作　　者：林开森 周健 李佳建 Lin Kaisen;Zhou Jian;Li Jiajian(Xizang Julong Copper Industry Co.,Ltd.;School of Civil and Resource Engineering,University of Science and Technology Beijing)

机构地区：[1]西藏巨龙铜业有限公司 [2]北京科技大学土木与资源工程学院

出　　处：《黄金》2024年第4期1-4,共4页Gold

基　　金：“十四五”国家重点研发计划项目(2022YFC2905003)。

摘　　要：通过数值模拟分析了巨龙铜矿平行巷道掘进过程中,断层破碎带与巷道间距对钻爆法掘进巷道围岩稳定性的影响。建立了不同巷道与断层破碎带间距下数值模拟计算模型,分析了围岩位移场、应力场及塑性区变化规律。数值模拟结果表明:巷道与断层破碎带间距为1 m和4 m时,断层破碎带对巷道围岩稳定性影响较大,巷道边帮最大位移值为6.19 cm和1.13 cm;最大主应力集中在巷道左侧围岩内,右侧围岩应力较小;水平方向应力集中在围岩与断层破碎带交界处;断层破碎带内出现塑性变形。当巷道与断层破碎带间距为7 m和10 m时,断层破碎带对巷道围岩稳定性影响较小,最大主应力与水平方向应力沿巷道中线近似对称分布,断层破碎带内无塑性变形。This study conducts numerical simulations to analyze the influence of the distance between roadway and fault fracture zone on the stability of excavation roadway surrounding rock during parallel roadway excavation with using the drilling and blasting method in the Julong Copper Mine.Numerical simulation models are established for different distances between roadway and fault fracture zone,and the variations in the displacement field,stress field,and plastic zone are analyzed.The numerical simulation results show that when the distance between roadway and fault fracture zone is 1 m and 4 m,the fault fracture zone has a significant impact on the stability of the surrounding rock of the roadway,with the maximum displacement values of the roadway side wall being 6.19 cm and 1.13 cm respectively.The maximum principal stress is concentrated in the left side surrounding rock of the roadway,with lesser stress in the right side surrounding rock.Horizontal stress is concentrated at the intersection of the surrounding rock and the fault fracture zone,and plastic deformation occurs within the fault fracture zone.When the distance between the roadway and the fault fracture zone is 7 m and 10 m,the influence of the fault fracture zone on the stability of the surrounding rock of the roadway is minor,with the maximum principal stress and horizontal stress approximately symmetrically distributed along the centerline of the influence,and no plastic deformation occurs within the fault fracture zone.

关 键 词：数值模拟 断层破碎带 位移分布 巷道掘进 钻爆法 稳定性 

分 类 号：TD32[矿业工程—矿井建设]