大断面全煤巷道支护设计优化

Support Design Optimization of Large Section All-coal Roadway

通过分析野川煤业3101工作面运输巷变形原因,得出了由于巷道顶煤留设较厚,内部裂隙发育,加之巷道支护强度较弱直接导致了巷道变形严重。通过支护设计优化,并对3102工作面运输巷围岩移近量进行监测,顶板最大下沉量195 mm,两帮最大移近量108 mm,相比优化前有了明显降低,证明优化后的支护方案科学合理。

By analyzing the deformation cause of transport roadway on the working face of No.3101 in Yechuan Coal Industry,it is concluded that the roadway deformation is serious due to the thick top coal reserve,the development of internal cracks and the weak supporting strength of the roadway.Through support design optimization and monitoring of surrounding rock movement of transportation roadway in 3102 working face,the maximum subsidence of roof is 195 mm and the maximum movement of two sides is 108 mm,which is significantly lower than before optimization,which proves that the optimized support scheme is scientific and reasonable.