大倾角工作面回采巷道断面形状优化  

Optimization Section Shape of Mining Roadway in Large Inclined Face

作　　者：高彪[1] GAO Biao(College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590

出　　处：《煤》2022年第3期32-35,共4页Coal

摘　　要：针对开采大倾角煤层时,矩形回采巷道出现围岩变形不对称的问题,在3308工作面轨道巷开挖前,设计矩形和直墙微拱形巷道断面,采用FLAC^(3D)对巷道应力分布特征、巷道围岩移进量及塑性区进行比较。结果表明:应力方面,直墙微拱形断面帮部和顶部破坏减少,承载能力较强。位移方面,直墙微拱形断面巷道围岩移进量总体比矩形小。综合可得,直墙微拱形巷道断面为最合适断面,最后针对直墙微拱形巷道提出对应支护建议,对类似巷道断面选取具有借鉴意义。Aiming at the problem of asymmetric deformation of surrounding rock in rectangular stoping roadway when mining high-angle coal seam,before the track gateway excavation in 3308 working face,the section of rectangular and straight-wall micro-arched roadway was designed,and the stress distribution characteristics,surrounding rock movement and plastic zone of roadway were compared by FLAC^(3D).The results show that:in terms of stress,the damage of the side and top of the micro-arch section of the straight wall is reduced,and the bearing capacity is stronger.In terms of displacement,the moving amount of surrounding rock of straight wall micro arch section roadway is generally smaller than that of rectangle.From a comprehensive point of view,the section of straight wall micro-arch roadway is the most suitable section.Finally,the corresponding support suggestions for straight wall micro-arch roadway are put forward,which has reference significance for the selection of similar roadway sections.

关 键 词：断面形状 围岩移进量 支护 数值模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]