高河矿回采巷道支护参数分析及优化

Analysis and Optimization of Support Parameters of Gateway in Gaohe Colliery

采用理论分析与数值计算方法对高河矿W4302回风顺槽支护参数进行分析,确定锚杆直径取22 mm、锚杆合理长度为2.4 m、锚杆合理间排距为800 mm×900 mm,锚索合理长度为8.3 m,间排距1400 mm×900 mm。工业试验围岩变形量监测结果表明,此支护方案支护效果较好,可以显著控制顶板岩体变形破坏,保证巷道正常使用。

By theoretical analysis and numerical calculation of the support parameters of w4302 return air gateway in Gaohe Colliery,it is determined that the bolt diameter is 22 mm,the reasonable length of bolt is 2.4 m,the reasonable spacing between bolts is 800 mm times 900 mm,the reasonable length of anchor cable is 8.3 m,and the spacing between rows is 1400 mm times 900 mm with good support effect,which can control the roof rock deformation and ensure the safety and stability of the roadway.