Project Optimization Research of Cut Blasting of Urban Tunnel

摘要

Generally speaking,the most influential factor of portal excavation is the detonation wave of cut blasting. Based on practical engineering,this paper researches on the three - dimension simulation of dynamic response with the method of ALE(arbitrary lagrangian-eulerian). On the basis of safety control requirements,the optimal blasting control scheme is obtained through the optimization of the quantity of the explosive,the spacing of blasting holes and the length of plug blasting holes. Finally the validity of numerical simulation is verified through comparing the numerical simulation result with the measurement result. Thus,the results and method can be used as reference for the safety -blasting control of urban tunnel excavation.