深埋隧洞强岩爆段水锤钻机超前应力释放试验研究OA

Rock burst is a world problem in the geological discipline of deep buried tunnel.The advance drilling of rock mass can release the internal stress of surrounding rock structure and reduce the grade and frequency of rock burst in the process of excavation disturbance.Through the space calculation of the drilling range and the optimization and modification of the drilling arm,the advanced stress release test of the water hammer drilling rig was carried out on the strong rockburst section during the TBM process of YinhanJiwei lingnan.The energy values of the microseismic monitoring system before and after the field test were compared.The results show that the advanced stress release of the water hammer drilling rig can reduce the grade,strength and damage range of the rockburst to a certain extent,reduce the amount of support engineering,and reduce the probability of delayed rockburst.It can provide reference for the subsequent construction and similar projects of TBM rockburst excavation section with increasing buried depth.