斜沟煤矿16502综采工作面运输顺槽支护优化研究与应用

为在斜沟煤矿16502工作面运输顺槽围岩稳定的条件下同时节约支护成本,采用FLAC3D数值模拟软件对锚杆各项支护参数进行支护效果模拟研究,结合巷道围岩的具体情况和数值模拟结果,确定采用增大锚杆长度、增大锚杆索间排距、提升锚杆索预紧力和初始张拉力及减小锚索断面个数的优化措施,在工作面回采期间进行矿压监测,验证优化后支护方案效果。结果表明,在优化后支护方案实施后,回采期间顶底板最大移近量为74 mm,两帮最大变形量为69 mm,保障了巷道围岩的稳定,有效节约了支护成本。

Research and application of optimization of transportation support for 16502 fully mechanized mining face in Xiegou Coal Mine

In order to save the support cost at the same time when the surrounding rock of the 16502 working face was stable,the support effects of the bolts were simulated using FLAC3D numerical simulation software.The results of numerical simulation determined the optimization measures to increase the length of the anchor rod,the distance between the anchor cables and the pretension force of the anchor cable and the initial tensile force,and reduce the number of sections of the anchor cable.Mine pressure monitoring verified the effectiveness of the optimized support scheme.The results showed that after the implementation of the optimized support scheme,the maximum approach amount of the top and bottom plates during mining was 74 mm,and the maximum deformation of the two sides was 69mm,which ensured the stability of the surrounding rock of the roadway and effectively saved the support cost.