Using theoretical analysis and simulation experiment ,the influence of gob shield angle on top coal fracture angle and the equilibrium feature of arched structure above gob shield have been studied .

• 分析了掩护梁角度对顶煤破断角及放煤口上方各种拱形结构平衡特征的影响,得出了综放支架掩护梁角度是顶煤回收率的重要影响因素的结论。