Verification Study on Residual Stress Equation of Pressure Relief in Blasting of High Ground Stress Tunnel

High geo-stress rock burst has obvious characteristics such as suddenness, ejection and continuity, which is extremely harmful to tunnel construction. According to the preliminary calculation of the residual stress equation of blasting pressure in previous studies, combined with the actual case of rock burst in a tunnel of Sichuan-Tibet line, the theoretical method and numerical simulation FLAC^3D method are used to analyze and summarize the residual stress variation law after tunnel blasting. The rationality and feasibility of the residual stress equation for pressure relief are verified. Comparing the results, it is found that the residual stress equation of blasting in hard rock and hard rock tunnel has good feasibility, and can better evaluate the application effect of blasting pressure relief.