Mining of Mineral Deposits

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Geo-mechanical classification of the Ighrem Aousser rock mass mining site of the Touissit Mining Company

Khalid Hossayni1, Abdelaziz Lahmili1

1Mohammadia School of Engineers, Mohammed V University in Rabat, Rabat, Morocco


Min. miner. depos. 2024, 18(2):132-139


https://doi.org/10.33271/mining18.02.132

Full text (PDF)


      ABSTRACT

      Purpose. The paper aims to classify the rock mass of the Ighrem Aousser (I/A) mine and analyze its fracturing to determine the appropriate excavation supports.

      Methods. The study begins with a geo-mechanical classification of the mass using widely used methods: Rock Quality Designation (RQD), Rock Mass Rating (RMR), Q-Barton, and Geological Strength Index (GSI). Fracturing surveys were then conducted to identify the main fracture families using DIPS software. Finally, UNWEDGE software was used to measure the support systems.

      Findings. The study provides a comprehensive geological study, including field observations, core drilling analysis, and structural analysis with DIPS software. Results indicate that the I/A mine rock mass is highly fractured and altered, as confirmed by mechanical tests at the Mohammadia School of Engineers' laboratory and empirical classifications. Based on these findings, appropriate support systems were identified using UNWEDGE software.

      Originality. This study provides a detailed classification and structural analysis of the I/A rock mass to propose and measure excavation supports. Integrated approach not only advances understanding of rock mass behavior, but also ensures optimized safety, stability, and productivity of mining operations, setting a new standard in sustainable mining development.

      Practical implications. In the mining industry, classifying rock masses and designing excavation supports enhances safety, increases site productivity by reducing contamination and lowering mining costs.

      Keywords: empirical classifications, rock mass, fracturing, support, DIPS, UNWEDGE


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