To solve the optimization problem of blasting parameters and consider the influence of interaction between blastholes on the spatial distribution of surrounding rock damage. the Riedel-Hiermaier-Thoma constitutive model parameters of marble were first calibrated from numerical trial calculation and impact test. Then. the blasting excavation of a tunnel in full section was numerically ... https://www.homehardware4ues.shop/product-category/diamond-drill/