Numerical Simulation Study on Tunnel Blasting in Hard Rock Geology
In this article,the technical parameters and hole layout method of tunnel blasting under the hard rock geology were studied,and numerical simulation software was used to analyze the damage and stress wave propagation law of the surrounding rock during the blasting process.Based on the the actual engineering geology of Jixin Village No.2 Tunnel,a hole layout method suitable for the hard rock tunnel drilling and blasting excavation was proposed accordingly.The excavation and blasting process of the tunnel was simulated using numerical simulation software,and the feasibility of the hole layout method was verified from the perspectives of surrounding rock damage and stress wave propagation.Based on on-site engineering of Jixin Village No.2 Tunnel,three rounds of bench blasting were carried out,with an average utilization rate of 90.9%.The results were good,verifying the feasibility of the blasting layout plan.The research results of this article can provide a reference for the design of blast holes in similar engineering projects.
tunnel blasting constructionhard rock geologysurrounding rock damagestress wave propagationhole layout by excavatingnumerical analysisexperimental verification
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