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IJSTR >> Volume 9 - Issue 12, December 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Evaluation Of Blasting Geometry To Fragmentation Of Rock And Blasting Cost On Pit Lisat Pt. Teguh Sinarabadi District West Kutai Province East Kalimantan, Indonesia.

[Full Text]



Dr. Ir. Sakdillah, M.M, Tommy Trides, S.T, M.T, Dian Abimanyu



Blasting Cost, Correlation, Fragmentation, Image Analysis, Kuz-ram Model, Powder Factor (PF).



The rock that has been erupted or called fragmentation was an important part of a blasting result, because the fragmentation of the rock is a direct impact of the explosion that will affect the next stage. Based on the company standard the success rate of the blasting activity is the percentage rate of boulder which is below 15%. To produce good fragmentation many things that affect blasting geometry is one of the things that can be controlled. To know the level of fragmentation of blasting results can be used calculation method with kuz-ram model and direct technique with image analysis method. The cost calculation also needs to be calculated to determine whether the blasting activity is economical or not. From eight explosions, boulder fragmentation was predicted by using kuz-ram model: 19,72%, 16,56%, 14,35%, 16,35%, 14,09%, 14,94%, 15,27 %, 16.90%. While the calculation of rock fragmentation level is actually used image analysis method using splitdekstop 2.0 software, and obtained the level of boulder fragmentation are: 20,77%, 19,58%, 15,90%, 17,35%, 15,80%, 16 , 92%, 16.60%, 17.56%. From each blasting activity is calculated how total blasting cost incurred, and obtained the total cost incurred are: 0.256 $ / BCM, 0.281 $ / BCM, 309 $ / BCM, 0.284 $ / BCM, 0.322 $ / BCM, 0.300 $ / BCM , 0.282 $ / BCM, 0.274 $ / BCM. Subsequently, a new blast geometry was proposed based on the R.L Ash equation (1963), C. J.Konya (1972), Anderson (1952), and Austin Powder. From the explosive cost calculation sought the equation of the relationship between the total cost of blasting and the powder factor (PF) is used to estimate the blasting cost incurred in accordance with the new usability geometry.



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