【摘要】 为了给深井综放沿空掘巷的支护选型和参数设计提供指导与依据,首先从结构力学的角度对目前综放沿空掘巷常用的工字钢棚和锚网梁(索)2种支护形式的作用机理进行了分析,然后通过实验室物理模拟试验研究了上述2种支护形式的作用效果,并且从关键承载层与次生承载层的相互关系分析了锚索的支护作用.结果显示,锚网梁(索)支护能很好地适应深井综放沿空掘巷的变形特点与维护要求,是理想的支护形式;顶板锚索的作用主要是将锚杆锚固形成的次生承载层与深部关键承载层连接起来,大大增强围岩稳定性.更多还原

【Abstract】 To provide guidance and basis for the selection of support form and the design of support parameters of deep gob-side entry, the action mechanisms of two support forms,i.e.I-steel set support and bolt support with wire mesh,bar and cable were analyzed from the aspect of structural mechanics,and then their supporting effects were investigated by physical simulation in the laboratory.The supporting principle of cable was analyzed based on the interrelation between the key bearing layer and the secondary one.The results showed that the bolt support with wire mesh,bar and cable was the perfect support form because it can well meet the requirement of deep gob-side entry for support,and the primary role of the roof cable is to link the key bearing layer and the secondary one,which can greatly increase the stability of surrounding rocks.更多还原