掌石沟煤矿锚杆支护技术

Bolt Support Technology in Zhangshigou Coal Mine

针对掌石沟煤矿15#煤层工作面开采条件,以15#煤及其顶底板岩石物理力学性质测定为基础,然后通过巷道围岩稳定性分析,得出锚固方式和锚固参数,并用数值计算进行验证。经围岩的变形观测可知:顶板最大变化量为79 mm,两帮最大收敛量为108 mm,说明该支护方案提高了巷道支护结构的整体承载能力,能有效控制巷道围岩的变形。

Aiming at the mining conditions of 15# coal seam working face in Zhangshigou Coal Mine, it was based on the determination of physical - mechanical properties of 15~ coal and its roof and floor rocks. Though the stability analysis of roadway surrounding rock, the anchoring methods and parameters were obtained, it was verified with numerical calculation. The surrounding rock deformation ob- servation showed that the roof maximum variation was 79 mm, the maximum convergence amount of two sidewalls was 108 mm, which indicated that this supporting scheme improved the whole load capacity of roadway supporting structure, and it could control effectively the deformation of surrounding rock.