中文摘要：

针对淮北矿区多次跨采巷道经反复维修仍无法满足正常使用的现状,以芦岭矿Ⅱ8 2人行上山为研究对象,通过对巷道工程地质条件的综合分析,总结了该类巷道4种典型的破坏特征,即金属网压茬处破坏、底鼓、棚腿内扎、U型棚非对称破坏。采用数值模拟和理论分析方法研究了此类巷道的变形破坏机理,提出了包括新型中空注浆锚索、高性能超强锚杆和围岩注浆加固的巷道围岩强化控制技术。实践表明,采用中空注浆锚索与高性能锚杆相结合的组合控制技术可有效控制多次跨采巷道的剧烈变形,上方工作面跨采结束后巷道顶底移近量为126~393 mm,经简单维修即可满足正常使用。

英文摘要：

Although high-frequent maintenance work has been performed on roadways affected by multiple overhead mining in Huaibei mining area,these roadways still cannot meet the requirement of normal coal production.Taking II82 gallery in Luling coal mine as an example,we summarized four common failure characteristics,namely the breakthrough of mental net joint,floor heaving,ingression of support leg,and asymmetric deformation of U-steel support based on the comprehensive analysis of engineering geological conditions.The deformation mechanism of roadways affected by multiple overhead mining was studied by theoretical analysis and numerical simulation,enhanced control technology including new hollow grouted anchor cable,high-effective bolt and grouting reinforcement technique was put forward.Field practice shows that the deformation affected by multiple overhead mining can be effectively controlled by using the supporting technology of hollow grouted anchor cable combined with high-effective bolt.Roof-to-floor relative displacement ranged from 126 to 393 mm after mining,which can meet normal production demand with routine maintenance.