深度破坏软岩巷道修复的锚架组合承载壳原理及实践  

Load-Bearing Shell Principle of Trusses Combined with Bolts in the Repairing of Soft Rock Roadway with Large Destruction and Its Application

作　　者：高明仕[1,2] 闫高峰[2] 杨青松[1,2] 孟宪义 张明华 

机构地区：[1]永城煤电控股集团有限公司,河南永城476600 [2]中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2011年第3期365-369,共5页Journal of Mining & Safety Engineering

基　　金：教育部科学技术研究重点项目(109075);江苏高校优势学科建设工程资助项目

摘　　要：平煤十一矿-593回风石门反复破坏反复维修,围岩松动破坏范围为2.50～4.0m,局部达到6.0～7.0m,大大超过了常规的锚固支护范围,使得锚杆、锚索等主动支护不能有效控制巷道围岩变形,致使该巷道越修越坏,严重影响和制约了矿井开采水平的开拓延伸和正常接替.采用锚架注组合承载壳原理支护技术,在长锚索主动支护的基础上,结合被动形式的U型钢棚支护,并在锚架之间进行注浆密实加固,形成大范围松散深度破坏巷道围岩的内部小范围的锚架注组合承载壳,即在巷道围岩浅表区域形成一个具有一定厚度和一定强度的组合承载壳,有效维护巷道的长期稳定性.回风石门修复1a后,顶板最大下沉量为324mm,两帮最大移近量为354mm.工程应用表明,该修复技术制定的参数合理,巷道维护效果明显,在类似破坏巷道的修复实践中可参考应用.The-593 m air-return crosscut of No.11 coal mine in Pingdingshan Mining Group had been repaired repeatedly,the loose and destroy zone of the surrounding rock was between 2.5 to 4.0 m,and even reached 6.0 to 7.0 m in local region,which had been greatly in excess of the conventionally anchorage zone.In that case,some active supports（anchor bolt,cable,et al） couldn＇t control the deformation of the roadway surrounding rock,and the roadway condition got worse after repeated repairing,which seriously affected and restricted the development stretching and supersedure of mining levels.By adopting the load-bearing shell principle of anchor-shed-grout,on the base of active long cable support and passive U-steel shed support,as well as grouting to strengthen the roadway between anchors and sheds,a small region of load-bearing shell of anchor-shed-grout,with certain thickness and strength,is formed within the superficial surrounding rock of large loose and destroy zone,to maintain the stability of roadway effectively and chronically.After the air-return crosscut being repaired for one year,the maximal roof convergence and two sides convergence was 324 mm and 354 mm,respectively.The engineering application shows that the established parameters of the repairing technology were reasonable and then the maintenance effect of roadway was remarkable,which can be applied as a reference in the repairing practice of similar destructive roadways.

关 键 词：破坏巷道 修复 锚架组合 承载壳 工程实践 

分 类 号：TD353[矿业工程—矿井建设]