厚煤层综放工作面回撤通道支护技术优化研究

基于某煤矿以往工作面回撤通道支护方式锚杆（索）间排距过小致使工作面回撤延迟、从而导致工作面接替紧张的问题，以该矿9105综放工作面为研究背景，采用理论分析的手段对回撤通道围岩受力特征进行研究，提出相应的优化支护方案，对优化支护方式进行数值模拟分析，并在现场进行工程应用。应用结果表明，合理地增加锚杆（索）间排距，巷道变形不明显；优化后的方案能够满足安全回撤的要求，缩短了工作面回撤周期，减少了支护材料，节约了成本。

Research on optimization of supporting technology for retreat passage in fully-mechanized caving face in thick coal seam

Based on the previous supporting mode of working face withdrawal channel in a coal mine，the row spacing between anchor bolts（cables） is too small，resulting in the delay of working face withdrawal and the shortage of working face replacement，taking 9105 fully-mechanized caving face of the mine as the research background，the mechanical characteristics of the surrounding rock of the withdrawal channel were studied by means of theoretical analysis，and the corresponding optimized supporting scheme was proposed，and the optimized supporting mode was numerically simulated and applied in the field.The results showed that the reasonable increase of bolt（cable） row spacing，roadway deformation is not obvious；the optimized scheme can meet the requirements of safe withdrawal，shorten the working face withdrawal cycle，reduce the supporting materials，and save the cost.