Abstract:Aiming at the insufficient theoretical study on rockburst prevention and the limited evaluation of traditional stress index in the tunneling in deep hard rock,a new method for rockburst prevention measures based on local energy release rate index is proposed. The design and construction control measures in the process of tunneling is comprehensively researched by using energy release rate index,which is analyzed in the numerical calculation using a new constitutive model reflecting the brittle failure of hard rock. First tunnel pitch and different tunneling sequences are proposed as a regional prevention measure by comparing the energy release magnitude of rock wall. Then the support opportunity and parameters of the design proposal are given based on the destress principle in the space-time evolution of the energy release. Meanwhile,the effect of the stress release hole for rockburst prevention is analyzed in the process of construction,the layout pattern of stress release hole is also optimized. At last,the prevention measures of rockburst failure for Jinping II Hydropower Station diversion tunnels are proposed. The practical results show that the proposed control measures are entirely feasible;and the method could benefit other similar projects.