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A new mining method for reopening the opencast mine of Kef Essennoun

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Category: Content №4 2023

Last Updated on 28 August 2023

Published on 30 November -0001

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Authors:

M.C.Mezam*, orcid.org/0000-0001-5604-0210, Mining Engineering Research Laboratory, National Polytechnic School of Algiers, Algeria, e-mail: mohamed_cherif.mezam@­­g.enp.edu.dz

M.A.Bachar Assed, orcid.org/0000-0002-4245-476X, Mining Engineering Research Laboratory, National Polytechnic School of Algiers, Algeria

M.Ould Hamou, orcid.org/0000-0002-8770-5323, Mining Engineering Research Laboratory, National Polytechnic School of Algiers, Algeria

S.Narsis, orcid.org/0000-0002-7079-0488, Environmental Research Center (C.R.E) sis at Campus Sidi Amar, Annaba, Algeria

A.Benselhoub, orcid.org/0000-0001-5891-2860, Environmental Research Center (C.R.E) sis at Campus Sidi Amar, Annaba, Algeria

*Corresponding author e-mail: mohamed_cherif.mezam@­­g.enp.edu.dz

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2023, (4): 026 - 032

https://doi.org/10.33271/nvngu/2023-4/026

Abstract:

Purpose. To treat the stability problem of the phosphate Kef Essennoun quarry in the mining field of Jebel Onk located in the Northeastern part of Algeria.

Methodology. To achieve these objectives, we started by monitoring the unstable area, using two monitoring systems: control stations and inclinometer. We then carried out a digital assessment of the Northwestern edge stability of the quarry under the current operating conditions of exploitation. After that, we proposed a new operating plan for the reopening of the depot under the required security conditions. At the end, we carried out an assessment of the edge stability, as the work to reopen and develop the Kef Essennoun quarry progressed.

Findings. The results show that, under the current operating conditions of exploitation, the Northwestern edge of the Kef Essennoun quarry is unstable (FS < 1). The backfilling of the pilot pit of the mine, lead to the assurance of the mine walls stability, by increasing the values of safety factors with a rate of more than 30 %.

 
Originality. The backfilling of the pilot pit of the mine and the resumption of top-down mining exploitation will ensure the stability of the quarry during and after the operating exploitation mining.

Practical value. The study of the stability of the embankments bleachers, the edges of the quarries and the facings of the slag heaps during the open pit mining of useful ores deposits is an essential step that must be done gradually according to the development of mining works to guarantee the safety of personnel, materials, reserves and the environment.

Keywords: Tebessa, Algeria, safety factor, embankments stability, mine reopening

References.

1. Fleurisson, J. A. (2012). Slope Design and Implementation in Open Pit Mines: Geological and Geomechanical Approach. Procedia Engineering 46, 27-38. https://doi.org/10.1016/j.proeng.2012.09.442.

2. Fleurisson, J. A., & Grenon, M. (2014). Conception géomécanique des talus de mines à ciel ouvert. Apr 2014, Marrakech, Morocco, (pp. 65-84).

3. Akbulut, I., Çam, I., Aksoy, T., Ölmez, T., Çağlan, D., Onak, A., …, & Çalişkan, V. (2014). Stability studies of the eastern slopes of Afşin-Elbistan, kişlaköy open-pit lignite mine (Kahramanmaraş, se Turkey), using the ‘finite elements’ and ‘limit equilibrium’ methods. Bulletin of the mineral research and exploration, 148, 107-118.

4. Shamsoddin Saeed, M., Maarefvand, P., & Yaaghubi, E. (2015). Two and three-dimensional slope stability analyses of final wall for Miduk mine. Geo-Engineering, 6, article 9. https://doi.org/10.1186/s40703-015-0009-0.

5. Dahmen, D. (2020). Geotechnical Aspects in Designing the Permanent Slopes of Future Lakes in Opencast Mines in the Rhenish Lignite Mining Area. In Triantafyllidis, T. (Ed.). Recent Developments of Soil Mechanics and Geotechnics in Theory and Practice. Lecture Notes in Applied and Computational Mechanics, (Vol 91). Springer, Cham. https://doi.org/10.1007/978-3-030-28516-6_12.

6. Abdellah, W. R., Hirohama, C., Sainoki, A., Towfeek, A. R., & Ali, M. A. M. (2022). Estimating the Optimal Overall Slope Angle of Open-Pit Mines with Probabilistic Analysis. Applied Sciences, 12(9), 4746. https://doi.org/10.3390/app12094746.

7. Fredj, M., Hafsaoui, A., Khadri, Y., & Boukarm, R. (2018). Influence of the failure surface choice on the safety factor value during slope stability studies. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (3). https://doi.org/10.29202/nvngu/2018-3/3.

8. Gadri, L., Hadji, R., Zahri, F., Benghazi, Z., Boumezbeur, A., Boukelloul, M. A., & Rais, K. (2015). The quarries edges stability in opencast mines: a case study of the Jebel Onk phosphate mine, NE Algeria. Arabian Journal of Geosciences, 8, 8987-8997. https://doi.org/10.1007/s12517-015-1887-3.

9. Dass Amiour, M., Mezghache, H., & Elouadi, B. (2013). The use of three physico-chemical methods in the study of the organic matter associated with the sedimentary phosphorites in Djebel Onk Basin, Algeria. Arabian Journal of Geosciences, 6, 309-319. https://doi.org/10.1007/s12517-011-0381-9.

10. Malaoui, R., Harkati, E. H., Soltani, M. R., Djellali, A., Soukeur, A., & Kechiched, R. (2023). Geotechnical Characterization of Phosphate Mining Waste Materials for Use in Pavement Construction. Engineering, Technology & Applied Science Research, 13(1), 10005-10013. https://doi.org/10.48084/etasr.5493.

11. Mezam, M. C., & Bachar Assed, M. A. (2016). Étude Rétro-analytique du glissement du bord Nord de la mine à ciel ouvert de Kef Essennoun (Djebel Onk), Algérie. Bulletin of Engineering Geology and the Environment ,76, 1307-1320.

12. Fredj, M., Hafsaoui, A., Khedri, Y., Boukarm, R., Nakache, R., Saadoun, A., & Menacer, K. (2018). Study of Slope Stability (Open Pit Mining, Algeria). Soil Testing, Soil Stability and Ground Improvement, Sustainable Civil Infrastructures. https://doi.org/10.1007/978-3-319-61902-6_1.

13. Slope/W. (2007). A software package for slope stability analysis. An Engineering Methodology. Seventh Edition, GEO-SLOPE International Ltd.

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