动压影响近距离巷道群内水仓加固技术

Reinforcing technology for sump in short-distance roadway group with dynamical pressure

调查了成庄矿二盘区水仓位置的地质条件、水仓支护状况和变形破坏特征。通过围岩钻孔窥视了解破坏后围岩内部裂隙的扩容变形程度和深度,并通过数值模拟对水仓围岩变形破坏原因进行分析;提出通过注浆充填水仓围岩内部裂隙,提高破碎围岩的承载能力,同时恢复形成完整连续的围岩结构体,增强锚索预应力往深部围岩传递能力的注浆综合加固支护设计。在成庄矿二盘区水仓成功应用,有效控制了已变形水仓围岩的进一步变形。

In this paper,geological conditions,supporting conditions and deformation char-acteristics of the sump in 2 # panel in Chengzhuang Mine are investigated. The dilatancy deforma-tion degree and depth of internal fracture in broken surrounding rock are peeped and got through boreholes,and the deformation and failure causes of the surrounding rock are analyzed with nu-merical simulation;then,a comprehensive grouting reinforcing supporting scheme is proposed, in which the grouting material is filled in the cracks to improve the bearing capacity of the broken surrounding rock,and recombine the complete and continuous surrounding rock structure body, and strengthen the ability of bolt-cable prestress transferring to the deep rocks. The successful application of this reinforcing supporting scheme in the sump in 2 # panel in Chengzhuang Mine makes the further deformation in surrounding rock of the deformed sump is effectively con-trolled.