针对济宁二号煤矿深部中厚煤层综采工作面地质条件复杂、开采深度大、工作面搬家频繁、采掘接续紧张、工作面孤岛开采等问题,研究了沿空留巷顶板运动规律,采用以巷旁充填早强混凝土为主体的沿空留巷技术,对沿空留巷巷旁混凝土墙受力与变形进行了数值模拟分析,并对巷旁支护参数和顶板锚固加强支护进行了设计。在93上02工作面运输巷中采用该技术沿空留巷870 m,混凝土墙墙体稳定;93上03工作面轨道巷沿空留巷后,矿压观测结果表明沿空留巷变形小于煤柱护巷,经济效益显著。

According to the complicated geological conditions, deep mining depth, frequent coal mining face removing, high tension replacement of coal mining fac e and excavation face, mining in island seam face and other problems of a fully mechanized coal mining face in the deep section of Jining No.2 Mine, the paper studied the roof movement law of the gateway retained along goaf.The gateway retained along goaf technology mainly with quick setting concrete backfilled at the gateway side was applied.A numerical simulation analysis was conducted on the stress and deformation of the concrete wall at the side of the gateway retained along goaf.A design was conducted on the support parameters of the gateway side and the anchor reinforced support of the roof.In the transporation gateway of No.93A02 mining face, the t echnology was applied to the gateway retained along the goaf with a length of 870 m and the concrete wall was stable.After the rail gateway of No.93A03 mining face g ateway retained along goaf, the mine strata pressure observation results showed that the deformation of the gateway retained along the goaf was less than the coal pill ar protected gateway and the economic benefits were obvious.