Application of Vibration Reduction Technology by In-hole Millisecond delay Detonation in Cutting Excavation Blasting

In view of the characteristics of the ambient circumstances,the real-time monitoring of blasting vibration was carried out in a cutting excavation.First,the attenuation rule of blasting seismic wave in this area was obtained by regression analysis of measured data,and the safe distance of regular blasting is determined as 27 m.Then,in the case of regular blasting in the range of18~27 m from buildings doing not meet safety requirements,a solution of in-hole millisecond delay detonation combining with decoupled charging was proposed.And the results of implementation showed that by using this method the desired effects were achieved,such as effectively controlling peak velocity of blasting vibration,improving efficiency of drilling and shipment.The results may provide a basis for blasting vibration control in complex environment.