Influence of charge structure on the energy transfer of blasting vibration and explosive effect

As an important parameter in blasting design, charge structure has a significant impact on blasting. From the perspective of impedance matching, the blasting energy of three charge structures was analysed theoretically. The relationship between the charge structure and energy transfer was obtained and the study results indicate that there exists a reasonable decoupling coefficient when the charge structure is decoupled, thus allowing to transfer the blast energy efficiently to the rock. Taking the blasting excavation of Longwangshan engineering project in Zhejiang as a practical example, the blasting vibration was tested to verify the provided formula of energy transfer. Through comparative analysis on the corresponding explosive effects, it is concluded that the decoupling charge with water as a decoupling medium can effectively reduce the vibrating energy of blasting, producing more uniform size fragment and reducing dust pollution caused by the blasting. © 2016, Chinese Vibration Engineering Society. All right reserved.