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Prediction of rock fragmentation in the Boukhadra’s mine conditions

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Category: Content №5 2024

Last Updated on 29 October 2024

Published on 30 November -0001

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Authors:

L.Bouterfif*, orcid.org/0009-0005-8513-9291, Laboratory of Environment, Mining Institute, Echahid Cheikh Larbi Tebessi University, Tebessa, Algeria; Mining Department,Faculty of Earth Sciences, Badji Mokhtar University, Annaba, Algeria, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

A.Hafsaoui, orcid.org/0000-0002-1720-9527, Laboratory of Natural Resources and Planning, Badji Mokhtar University, Annaba, Algeria

I.Zeriri, orcid.org/0009-0006-5247-8841, Environmental Research Center (C.R.E), Annaba, Algeria

M.Attia, orcid.org/0000-0003-3700-7049, Laboratory of Environment, Mining Institute, Echahid Cheikh Larbi Tebessi University, Tebessa, Algeria

A.Idres, orcid.org/0000-0001-8029-0930, Laboratory of Valorisation of Mining Resources and Environment (LAVAMINE), Badji Mokhtar University, Annaba, Algeria

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (5): 025 - 029

https://doi.org/10.33271/nvngu/2024-5/025

Abstract:

Purpose. The objective of the study consists in obtaining better quality rock fragmentation by using inclined holes to ensure good energy distribution and better stability of the upper wall.The Kuz-Ram model and the Langefors method are best suited to achieve the goal.

Methodology. The study compares the blasting plan adopted by the Boukhadra mine located in the Wilaya of Tebessa, with that calculated by the Langefors method while using inclined holes. We chose the Kuz-Ram model as a simulation model and validation for the following reasons.

Findings. The application of the proposed method of Langefors gave a satisfactory result in terms of process efficiency, the Kuz-Ram model predicts a significant reduction in the rate of oversized blocks using an inclined hole drilling technique, from 13.1 to 5.3 %. This approach appears to improve the degree of fragmentation, reduce the percentage of oversized blocks and decrease energy loss during blasting.

Originality. Rock fragmentation, which corresponds to the size distribution of fragments of the blasted rock, is one of the most important indices for estimating the effectiveness of blasting works where the size of the fragments of the blasted pile plays an important role in efficient transportation, crushing and grinding.The size of the fragments depends on the characteristics of the rock mass, the type of explosive used, and the drilling and blasting pattern.

Practical value. The use of inclined holes is an important technique to optimize rock fragmentation in open pit mines. The inclination can be adjusted to improve the direction and distribution of blast energy, which contributes to more efficient and uniform fragmentation of extracted rocks.

Keywords: rock, rock jointing, blasting, inclined holes, Tebessa, Algeria

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