Tóm tắt:

The classification of blastability of rock mass on blasting efficiency has been developed by many researchers. In general, the classification of blastability usually deal with some factors such as: the characteristics of rock, powder factor, the geostructure of rock mass. These method has advantages and disadvantages and they are applied in mining for long time and are suitable for each practical conditions. This paper presents some results of applying the quick evaluation of blastability index BI by Ghose when blasting in limestone quarries for cement production in Vietnam. The results shows the practicability of this classification method in supporting the mining engineers in quantitatively evaluating the blastability of rock mas for getting better blasting efficiency.