Tweet Share

• Send by email

  Send by email

  

  Environmentally low impact blasting in urban residential area

  To reduce the load caused by tunnel blasting on environment, including psychological effects on residents, it is quite effective to reduce the blast vibration and duration of blasting time. At Anei River tunnel project, as the tunnel goes right under the residential area and it goes through stratum of hard granite, it was necessary to carry out blasting excavation, then blasting with low vibration and less sensible to human body was required. Due to the given conditions of the tunnel, the conventional blasting technique could not allow the blasting excavation but we could succeed to continue blasting excavation with new electronic detonator (eDev II) which allowed us to control the initiation delay time with very high accuracy and we could reduce the vibration sensed by human body and load on buildings. Then we continueｄ the blasting excavation of the tunnel with understanding from residents. We would introduce how we reduce blasting vibration in this project and various information which we obtained from a series of blasting tests with this new electronic detonator, such as properties of blasting vibration, frequency characteristics of blasting vibration, relation between distance and vibration velocity etc.

  Recipient :

  Name ^* :

  E-mail address ^* :

  ^* Required fields

  Send   or  Cancel

• Print