Improve the Half Hole Rate of Full Section Tunnel Excavation
The application of controlled blasting construction technology in the excavation process of the TB hydropower station tunnel can improve the quality of excavation construction.However,in the original drilling and blasting construction,the blasting effect could not meet expectations,and the half hole ratio was relatively low.Therefore,it is necessary to analyze the excavation plan of the project.By studying the excavation plan of full section tunnel blasting,this article analyzes the shortcomings in blasting construction,and from the perspective of blasting theory research,analyzes the influence of the size of the half hole ratio on the blasting effect,clarifying the factors that affect the half hole ratio.By reasonably selecting the detonation method and adjusting the blasting parameters,the half hole ratio can be improved to ensure the blasting effect.
full section cavernexcavation constructionblasting parameterhalf porosity
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