A linear superposition method was used for modeling the time history of the production blast vibrations and optimizing the blast sequence to reduce vibration levels in Sar-Cheshmeh copper mine, Kerman, Iran. A single-hole blast for modeling and two double-hole blasts with time delays of 25 and 65 ms between two holes for modeling validation were carried out. The generated vibrations were measur...

Predicting the peak ground velocity (PGV) of vibrations is essential to blast mining operations in order design charge weights so as not exceed certain thresholds that prevent damage buildings and other infrastructure. The problem usually marred by a large scatter observed PGV due unknown complexities seismic wave propagation. Classic prediction methods employ empirical formulas, most widesprea...

a considerable amount of energy is released in the form of shock wave from explosive charge detonation. shock wave energy is responsible for the creation of crushing and fracture zone around the blast hole. the rest of the shock wave energy is transferred to rock mass as ground vibration. ground vibration is conveyed to the adjacent structures by body and surface waves. geological structures li...

The drill & blast method is still the most typical method for medium to hard rock conditions. It can be applied to a wide range of rock conditions. Some of its features include versatile equipment, fast start-up and relatively low capital cost tied to the equipment. On the other hand, the cyclic nature of the drill & blast method requires good work site organization. Blast vibrations and noise ...

SYNOPSIS This paper details an assessment of stemming practices at a South African opencast coal mine and their influence on ground vibration air blast. Quantitative qualitative analysis methods were used for the study. The parameters assessed quantitative analyses included length, material type, blast-hole depth, burden, spacing. Pre-blast data from was analysed to determine deviation between ...

Cut blasting is one of the most essential processes to reduce blast-induced vibration in tunnel blasting. The long and large-diameter uncharged hole boring (LLB) method an example cut methods, which utilizes holes drilled face. In this study, simulations were performed analyze its mechanism, LLB traditional burn-cut simulated compare their efficiency. A 3D numerical analysis using LS-DYNA code,...

A considerable amount of energy is released in the form of shock wave from explosive charge detonation. Shock wave energy is responsible for the creation of crushing and fracture zone around the blast hole. The rest of the shock wave energy is transferred to rock mass as ground vibration. Ground vibration is conveyed to the adjacent structures by body and surface waves. Geological structures li...