Low cost quasi presplit blasting technology in side slope rock excavation

摘要

Quasi presplit blasting model of highway slope was built with ANSYS/LS-DYNA, and constitutive relation of rock under blasting load was simulated with elastic-plastic model. With MAT-PLASTIC-KINEMATIC material model, considering decouple coefficient, linear charge density, charge diameter and the space of blastholes in blasting, the simulated calculation for buffer hole explosion stress field was carried out. By blasting test on highway construction site, using blasting vibration measurement IDTS3850 vibration meter, the design of model and accuracy of parameters were checked and the feasibility of design scheme of buffer hole was verified.