分析深井大断面煤巷变形特征及难控制的原因,通过模拟不同支护状态下巷道围岩变形情况,探讨了锚杆、锚索作用机理,提出及时抗、滞后让、控顶(底)固帮、高强度支护的控制原理。认为稳定的承载结构及早形成,并与支护体一同承载,从而加强巷道稳定性,利用锚杆自身的延伸量和锚索尾部安装的多级让压结构,确保支护体适应深井大断面煤巷围岩变形大的特点。工程实践表明,巷道掘进期间两帮移近量为140 mm,顶底板移近量为121 mm,巷道稳定性较好。

The paper analyzed the deformation features and the hard control cause of the large cross section seam gateway in deep mine, simulated the surroundi ng rock deformation conditions of the gateway under the different support conditions, discussed the mechanism of the bolt and anchor roles and provided the timely sup port, delay yield, roof (floor) control and sidewall reinforcement, and the high strength support.The paper held that the stable loading structure and early formation with t he support system jointly loading could maintain the gateway stability.The expansion value of the bolt and the multi yield structure installed at the tail of the anchor coul d ensure the support system meet the high deformation features of the surrounding rock along the large cross section seam gateway in the deep mine.The project practi ces showed that during the gateway driving period, the convergence between the two sidewalls was 140 mm, the convergence between the roof and floor was 121 mm and the stability of the gateway was good.

国家重点基础研究发展计划(973计划)资助项目(2010CB226803)；国家自然科学基金资助项目(51174016,50774012)；