Suitable pattern design of drilling and blasting is very important in open pit mines. Using explosive energy for rock fragmentation with minimum cost production one the purposes The most parameters are including diameter hole, specific charge, burden thickness suitable dimensions fragmentation. In this paper, charge calculated based on quality mass then definition maximum mines calculated. a ne...

The general transmissivity law of ground vibrations was studied, and a user-friendly methodology for determining the behavior generated in any rock mass is proposed. study based on single blast trench excavation, analyzing vibration components recorded from two fixed locations. attenuation main variables according to legal requirements, frequency peak particle velocity (PPV), are defined with t...