巷道交叉点对穿锚索支护技术研究  

Research on Supporting Technology of Crossing Point of Roadway Through Anchor Cable

作　　者：于永政 吴起 徐进[3] 张宝林 张显 YU Yongzheng;WU Qi;XU Jin;ZHANG Baolin;ZHANG Xian(Jiangsu College of Safety Technology,Xuzhou,Jiangsu 221000;不详)

机构地区：[1]江苏安全技术职业学院,江苏徐州221000 [2]江苏煤矿安全监察局安全技术中心,南京210024 [3]常州工程职业技术学院,江苏常州213164

出　　处：《工业安全与环保》2021年第5期38-41,共4页Industrial Safety and Environmental Protection

摘　　要：为了提高巷道交叉点围岩的支护效果,采用理论分析的方法,建立半平面体力学计算模型,分析了法向分布力作用对岩体应力状态的影响和岩体内部三维应力分布状态;采用数值模拟计算的方法,模拟巷道交叉点围岩在预应力作用下的应力状态,揭示预应力锚索与围岩之间相互作用机理。结果表明:预应力锚索支护可改善交叉点围岩应力状态,防止裂隙扩展,提高围岩自身承载能力;通过锚杆支护结合对穿锚索加固的方法,巷道交叉点支护效果良好,保障了矿井安全生产,可为今后类似工程的矿山开采实践提供经验。In order to improve the supporting effect of the surrounding rock at the intersection of the roadway,a half plane mechanical calculation model is established by using the method of theoretical analysis and the influences of the normal distribution force on the stress state of the rock mass and the three-dimensional stress distribution in the rock mass are analyzed;the numerical simulation method is used to simulate the stress state of the surrounding rock at the intersection of the roadway under the pre-stressed action,and to reveal the interaction mechanism between the pre-stressed anchor cable and the surrounding rock.It is proposed that the pre-stressed anchor cable support can improve the stress state of the surrounding rock at the intersection,prevent the crack expansion and improve the bearing capacity of the surrounding rock.Through the combination of bolt support and anchor cable reinforcement,the effect of roadway intersection support is good,which ensures the safety of mine production,and provides experience for the mining practice of similar projects in the future.

关 键 词：巷道交叉点 预应力锚索 半平面体 数值模拟 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]