大断面切眼软弱破碎围岩锚固机制及控制技术  

Anchoring Mechanism and Controlling Technology of Large Section Open-off Cut of Fragile Weak Surrounding Rock

作　　者：杜贝举 党泉林 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454010

出　　处：《煤炭技术》2016年第2期89-92,共4页Coal Technology

摘　　要：针对软弱围岩大断面切眼的变形特征,分析了围岩破坏机理,以群锚和高预应力为锚固机制,提出了高强锚杆+锚索+组合构件的支护方案,采用FLAC3D分析了未支护和支护时巷道的塑性区范围和变形量。结果表明支护后巷道围岩塑性区和变形量明显减小,现场检测表明,该支护方案有效地控制了围岩变形,同时验证了方案的可行性。For deformation features of the weak brittle wall rock of large cross section open-off cut,analyzing the failure mechanism of rock, making group anchoring and high prestress as anchoring mechanism, a combination of high strength bolt＋anchor＋member support program was proposed. Using FLAC3 Danalyzed plastic zone and deformation of roadway when no support and support. The results showed they were reduced obviously with supporting. Field tests showed surrounding rock deformation was well controlled, which also verified the feasibility of the program.

关 键 词：大断面 软弱围岩 群锚 高预应力 

分 类 号：TD322[矿业工程—矿井建设]