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冲击地压巷道支护问题一直是研究的热点。采用相似模拟试验和数值模拟的研究方法,对裸巷和刚柔吸能支护巷道的冲击破坏过程进行研究。试验和数值计算结果均表明,无支护巷道冲击变形破坏较严重,在巷道顶板和两帮壁面均出现裂缝扩展和贯通,甚至出现抛出物冲入巷道和塌落现象;刚柔吸能支护具有缓冲和吸收冲击能作用,表现为巷道顶板和两帮壁面发生向巷道内部变形,同时有局部壁面出现裂缝,但巷道整体性完好;裸巷和吸能支护巷道冲击破坏规律基本一致,吸能支护巷道冲击破坏程度弱,整体性好,刚柔耦合支护更有利于冲击地压巷道支护。
Rockburst roadway support problem has been a hot topic. Using similar simulation experiments and numerical simulation methods, the impact damage process of bare roadway and rigid-flexible supporting roadway was studied. The tests and numerical results show that the impact deformation and failure of unsupported roadway are more serious. Cracks extend and penetrate into the roof and the two walls of the roadway, and even thrown into the roadway and slump; The protection has the effect of buffering and absorbing impact energy, which is manifested as that the roof and the two walls of the roadway are deformed to the inside of the roadway while the cracks of the part of the roadway appear. However, the integrity of the roadway is intact; the impact and damage rules of the roadway and the roadway are basically the same, Energy absorption support roadway impact damage is weak, integrity is good, rigid-flexible coupling support is more conducive to rock burst pressure roadway support.