Analysis of fragmentation results from limestone blasting  activities at Semen Padang company

Syahida Al-adi Rahmattullah; Suci Fitria Rahmadhani Z; Rizto Saliazakri; Nofrohu Retongga

doi:10.31643/2027/6445.40

Authors

Syahida Al-adi Rahmattullah Mining Engineering, STTIND Padang
Suci Fitria Rahmadhani Z Mining Engineering, STTIND Padang
Rizto Saliazakri Mining Engineering, STTIND Padang
Nofrohu Retongga Mining Engineering, STTIND Padang

DOI:

https://doi.org/10.31643/2027/6445.40

Keywords:

blast geometry, fragmentation, R.L Ash, Kuz-Ram, C.J Konya, ICI Explosive.

Abstract

Semen Padang is a company engaged in the mining of limestone and silica rock as the main raw materials for cement production. The mining system used is open-pit mining. This study discusses the effect of geometry on rock fragmentation. The purpose of this study is to determine the blasting geometry and identify the causes of limestone block formation at the PT. Semen Padang site. The research focuses on fragmentation because fragmentation is a determining factor in the success of blasting activities. Fragmentation plays an important role in improving the company's targets, and the distribution of fragmentation must be optimal. To control fragmentation, blasting geometry is required as a parameter. Based on the results of the researcher's observations in the field, the size of rock chunks in the company that are larger than 80 cm is around 25%, so it is necessary to re-evaluate the blasting geometry. The purpose of this study is to determine the geometric design that produces the desired fragmentation, which is below 15% on an 80 cm sieve, so that production can be increased and a comparison can be made between the R.L Ash, C.J Konya, and ICI Explosive methods. The method used for the ideal blasting geometry design is the R.L Ash method with supporting theory using the Kuz-Ram theory. After data processing, the ideal geometry was obtained with a load value of 4.32 m, a distance of 5.18 m, stemming of 4.32 m, a blasting hole depth of 12.1 m, a filling column length of 7.78 m, and a blasting hole diameter of 5 inches, with a lump fragmentation percentage of around 15%.

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Author Biographies

Syahida Al-adi Rahmattullah, Mining Engineering, STTIND Padang

Mining Engineering Class of 20, Padang Industrial Technology College, Jl. Hamka No. 121, Parupuak Tabing, Koto Tangah District, Padang City, Indonesia.

Suci Fitria Rahmadhani Z, Mining Engineering, STTIND Padang

Mining Engineering Class of 20, Padang Industrial Technology College, Jl. Hamka No. 121, Parupuak Tabing, Koto Tangah District, Padang City, Indonesia. ORCID ID: https://orcid.org/0000-0003-0714-3672

Rizto Saliazakri, Mining Engineering, STTIND Padang

Mining Engineering Class of 20, Padang Industrial Technology College, Jl. Hamka No. 121, Parupuak Tabing, Koto Tangah District, Padang City, Indonesia.

Nofrohu Retongga, Mining Engineering, STTIND Padang

Mining Engineering Class of 20, Padang Industrial Technology College, Jl. Hamka No. 121, Parupuak Tabing, Koto Tangah District, Padang City, Indonesia.

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