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针对鹤岗矿区兴安矿深部软岩巷道变形破坏严重的问题,结合巷道围岩结构和变形破坏特征,将该矿重车线冒落区顶板划分为层状砂岩互层、节理砂岩、块状砂岩和碎裂煤岩四种结构模式。利用UDEC2D数值模拟软件,分析不同模式顶板变形破坏过程和冒落机理,并提出以锚网索喷-柔层桁架耦合支护为主体的上下双硐室稳定性耦合支护技术。结果表明,砂岩互层顶板层间黏结力不同导致不均匀变形;节理砂岩顶板节理面摩擦系数不一致导致节理面滑移;块状砂岩顶板岩块间存在节理裂隙导致顶板下沉;碎裂煤岩顶板松散破碎,在上覆岩层力的作用下冒落。新支护技术可以在较短的时间内控制巷道变形,且变形量小,稳定时间快,为深部软岩巷道冒落治理提供了参考。
In view of the serious deformation and destruction of deep soft rock roadway in Xing’an Mine of Hegang Mining Area, the roof of the caving lane in the heavy truck line is divided into layered sandstone interbedded layers, jointed sandstone and massive sandstone And broken coal rock four structural modes. UDEC2D numerical simulation software is used to analyze the deformation and failure process and caving mechanism of roof with different modes, and the up-and-down double-chamber stability coupling support technology is put forward, which is mainly composed of bolting-soft layer truss coupling support. The results show that the difference of the interlayer adhesion between the sandstone interbedded roofs results in the non-uniform deformation. The inconsistent friction coefficients of the joint surface of the jointed sandstone cause the joints to slip; the jointed rock masses of the blocky sandstone have joint fissures leading to the roof falling; Roof loose and broken, overlying the rock under the action of force to take off. The new supporting technology can control the deformation of the roadway in a relatively short period of time, and the deformation is small and the stabilization time is fast, which provides a reference for the settlement control of deep soft roadway.