不同锚杆支护参数对煤巷支护效果的影响研究  

Study on Distribution of Support Effect of Different Bolt Support Parameters on the Coal Roadway

作　　者：王凤祥 Wang Fengxiang(Sitai Mine of Jinneng Holding Coal Industry Group Co.,Ltd.,Datong Shanxi 037000)

机构地区：[1]晋能控股煤业集团有限公司四台矿,山西大同037000

出　　处：《机械管理开发》2021年第10期103-104,共2页Mechanical Management and Development

摘　　要：分析了在不同锚杆长度、直径、排距及预紧力参数下巷道围岩的变化分布规律。分析认为:锚杆长度的增加,煤巷顶底板围岩移近率呈现减小的趋势;锚杆直径的增大,巷道顶底板和两帮的位移变化量逐渐减小,锚杆支护效果好;锚杆间排距的减小,巷道顶底板和两帮的剪切破坏区域会出现减小现象,对巷道的支护效果显著;锚杆预紧力的增大,可有效提高锚杆尾应力的集中程度,支护效果好。The variation and distribution of roadway surrounding rock under different bolt length,diameter,row spacing and preload parameters are analyzed.The analysis shows that with the increase of bolt length,the proximity rate of surrounding rock at the top and bottom of coal roadway decreases;With the increase of bolt diameter,the displacement of roadway roof,floor and two sides decreases gradually,and the bolt support effect is good;With the decrease of row spacing between bolts,the shear failure area of roadway roof,floor and two sides will be reduced,which has a significant effect on roadway support;The increase of bolt preload can effectively improve the concentration of bolt tail stress,and the support effect is good.

关 键 词：锚杆支护 巷道稳定性 围岩移近率 

分 类 号：TD353.6[矿业工程—矿井建设]