装载硐室大孔径预应力注浆锚索加固技术研究

Research on Large Diameter Pre-stressed Grouting Cable Anchor Reinforcement for Loading Chamber

麻家梁煤矿主井箕斗装载硐室破坏严重,现有支护强度不足。通过分析硐室破坏原因,提出采用新型大孔径预应力注浆锚索加固方案,并介绍了支护加固设计及施工技术要点。数值模拟分析及现场工业试验表明,采用大孔径预应力注浆锚索加固方案能够满足装载硐室的受力和变形要求,锚索受力合理,顶板及两帮位移得到有效控制,取得了良好的加固效果。

The loading chamber of main shaft skip was damaged seriously in Majialiang coalmine and the supporting strength was insufficient.By the analysis on the damage reasons,new reinforced scheme of large diameter pre-stressed grouting cable anchor was proposed and the paper introduces the key points of the design and construction technology.The numerical simulations and the industrial test showed that the scheme can meet the requirements of the force and deformation of the loading chamber,the cable force is reasonable,the roof and 2 sides of displacement are effectively controlled with good reinforcing effect.