Study on the stress attenuation characteristics of rock explosion wave and the influence of cracking range under uncoupled charge
DUAN Jicheng
Abstract：In order to study the influence of blasting medium and uncoupled charge structure on the propagation of blasting stress wave and damage caused in rock,the numerical simulation of rock blasting with different wave impedance under the condition of uncoupled charge is carried out by LS-DYNA software.The results show that the RHT model has the ability to accurately reproduce the damage morphology of rock explosion,and the damage degree of blasting medium shows a decreasing trend with the increase of wave impedance and decoupling coefficient.The relationship between stress and explosion center distance expressed by exponential function can effectively describe the attenuation characteristics of explosion stress wave.In addition,the radius of the fracture zone increases first and then decreases in the increasing process of the uncoupling coefficient.The attenuation model constructed can evaluate the damage status of specific positions in the blasting medium and provide a reliable prediction basis for the safety assessment of blasting engineering.
Keywords：LS-DYNAuncoupled chargewave impedanceexplosion stress waveradius of fracture zone
Publication Date：2025-03-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 27-32 )