Shandong Hongyang Mining Industry Co.

以山东宏阳矿业沿空留巷的12103运输顺槽为对象,对沿空留巷切顶卸压开采关键参数进行研究,采用理论分析、数值模拟、工业性试验相结合方法研究切顶高度、切顶角度、切顶钻孔间距对切顶留巷影响,确定最优参数:切顶高度21.8m、切顶角度5°、切顶钻孔间距900mm。按最优参数实施切顶卸压后,留巷效果理想,下次使用前无需整修。

Taking the 12103 transportation channel of the goaf retaining roadway in Shandong Hongyang Mining as the object, the key parameters of roof cutting and pressure relief mining in the goaf retaining roadway were studied. A combination of theoretical analysis, numerical simulation, and industrial experiments was used to study the effects of roof cutting height, roof cutting angle, and roof cutting drilling spacing on the roof cutting retaining roadway. The optimal parameters were determined: roof cutting height 21.8 m, roof cutting angle 5 °, and roof cutting drilling spacing 900 mm. After implementing top cutting and pressure relief according to the optimal parameters, the effect of retaining the roadway is ideal, and there is no need for renovation before the next use.