Pengaruh Parameter Geoteknik Hasil Pengeboran terhadap Desain Tambang di PT. Insani Baraperkasa, Kutai Kartanegara
DOI:
https://doi.org/10.61132/globe.v3i2.788Keywords:
Slope Stability, Safety Factor, Geological Strength Index (GSI), Landslide Probability, Morgenstern-PriceAbstract
Mining with an open pit system is carried out by excavating and removing the overburden to obtain coal. However, before mining, it is important to obtain geotechnical data information. As well as the lithology of the rocks below the surface, it is necessary to carry out geotechnical drilling (full coring). This study can determine the value of slope geometry safety factors and plan safe slope geometry, both individual slopes and overall slopes. Therefore, this was done to determine the influence of GSI geotechnical parameters on the value of static and dynamic slope safety factors. The method used in determining the safety factor and the probability of an avalanche is the Morgenstern-Price boundary equilibrium method with the Generalized Hoek-Brown collapse criterion in static and dynamic slope conditions. The input parameters used in the analysis were natural density, compressive strength value (UCS), geological srength index (GSI), disturbance factor (D), intact rock constant (mi), as well as seismic load factor, and groundwater level. The optimal geometry on the Highwall slope is the configuration of the Highwall slope with a height of 74 m and an angle of 23°, supported by a single slope of 5-10 meters, a berm of 7 meters with an angle of 40°. Seam D Claystone lithology with GSI 50, Siltstone with GSI 70, Sandstone with GSI 70, and Seam E Claystone lithology with GSI 50, Siltstone with GSI 40, Sandstone with GSI 75.Can be applied within a safe limit where FK Static 1.7 PK Static 0% and FK Dynamic 1.4 PK Dynamic 6%.
References
Arif, I. (2016). Geoteknik tambang. PT Gramedia Pustaka Utama.
Braja, M. D. (1985). Mekanika tanah (Jilid 2). The University of Texas.
Budi, G. S. (2011). Pengujian tanah di laboratorium: Penjelasan dan panduan. Graha Ilmu.
Das, B. M. (2007). Fundamentals of geotechnical engineering (3rd ed.). Cengage Learning.
Hardiyatmo, H. C. (2002). Mekanika tanah I. Gadjah Mada University Press.
Marinos, V., Marinos, P., & Hoek, E. (2005). The geological strength index: Applications and limitations. Bulletin of Engineering Geology and the Environment, 64(1), 55–65. https://doi.org/10.1007/s10064-004-0270-5
Rai, M. A., Suseno, K., & Ridho, K. W. (2014). Mekanika batuan. Institut Teknologi Bandung.
Satyana, A. H., Nugroho, D., & Surantoko, I. (1999). Tectonic controls on the hydrocarbon habitats of the Barito, Kutei, and Tarakan Basins, Eastern Kalimantan, Indonesia: Major dissimilarities in adjoining basins. Journal of Asian Earth Sciences, 17, 99–122. https://doi.org/10.1016/S1367-9120(98)00036-4
Steffen, O. K. H., Contreras, L. F., Terbrugge, P. J., & Venter, J. (2008). A risk evaluation approach for pit slope design. Proceedings of the 42nd US Rock Mechanics Symposium and 2nd US-Canada Rock Mechanics Symposium, San Francisco.
Takwin, G. A., Turangan, A. E., & Rondonuwu, S. G. (2017). Analisis kestabilan lereng metode Morgenstern-Price studi kasus Diamond Hill Citraland. Jurnal Tekno, 15(67), 1–10.
Wesley, L. D. (2010). Mekanika tanah untuk tanah endapan dan residu (Terj. Laurence D. W.). Penerbit Andi.
Wyllie, D. C., & Mah, C. W. (2004). Rock slope engineering: Civil and mining (4th ed.). Spon Press.
Zhang, L. (2016). Determination and applications of rock quality designation (RQD). Journal of Rock Mechanics and Geotechnical Engineering, 8(3), 389–397. https://doi.org/10.1016/j.jrmge.2016.03.003
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