Jeoloji Münendisliği Dergisi
Jeoloji Mühendisliği Dergisi

Jeoloji Mühendisliği Dergisi

2014 HAZİRAN Cilt 38 Sayı 1
COVER
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COPYRİHT PAGE
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CONTENTS
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Slope Stability Assessment of Rock Slopes in an Open Pit Albite Mine Using Finite Element Method (FEM)
Tümay Kadakci Koca Mehmet Yalçin Koca
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ABSTRACT: The study area is Alipaşa open pit albite mine which takes place in Aydın, Çine-Karpuzlu. Onlyleucocratic orthogneiss rock unit outcrops out in the mine. The albite mineralisation located in the N25Edirection with 900 m length and in the N65W direction with 120 m width. 45 m thickness below the presentmine base (395 m) of the open pit has been planned to be mined. The scope of this study is to determinethe optimum overall slope angle of the eastern slopes of the mine at the time which the mining operationsare terminated. In this context, based on the detailed field investigation and laboratory tests performed onthe rock material, numerical analyses for the deep slopes (H>100 m) were conducted. In the numericalmodelling, applicability of the finite element method (FEM) considering the Generalized Hoek-BrownCriterion and Equivalent Mohr-Coulomb parameters to the jointed rock slopes in the study area wasinvestigated. In this process, firstly five geotechnical cross-sections passing through the area affected fromlocal rock block slides were taken; secondly stability analyses of the overall slopes along these crosssections considering the variations of Geological Strength Index (GSI), seismic acceleration coefficient,slope angle and water table location (WTL) were conducted by using a two-dimensional FEM softwarePhase2 V.7.013. The causes and mechanisms of the slope instabilities, the factor of safety values (stressreduction factors: SRF) for each cross-section were determined. The results obtained from each criterionwere compared by statistical software SPSS V.15.0.1 to determine the optimum overall slope angle interms of the best fitting criterion for the orthogneisses.

  • Albite open pit mine

  • Equivalent Mohr-Coulomb parameters

  • Generalized Hoek-Brown Criterion

  • Orthogneiss

  • Finite Element Method (FEM)

  • Slope stability

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  • Li, A.J., Merifield, R.S., Lyamin, A.V., 2008. Stability charts for rock slopes based on the Hoek–Brown failure criterion. International Journal of Rock Mechanics and Mining Sciences, 45, 689-700.

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  • Sofianos, A.I., Nomikos, P.P., 2006. Equivalent Mohr– Coulomb and generalized Hoek–Brown strength parameters for supported axisymmetric tunnels in plastic or brittle rock. International Journal of Rock Mechanics and Mining Sciences, 43, 683- 704.

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  • Tanyaş, H., Ulusay, R., 2013. Assessment of structurally-controlled slope failure mechanisms and remedial design considerations at a feldspar open pit mine, Western Turkey. Engineering Geology, 155, 54– 68.

  • Uygun, A., Gümüşçü, A., 2000. Geology and origin of the albite deposite of the Çine submassif, southern Menderes Massif (SW-Turkey). Bulletin of the Mineral Research and Exploration, 122, 23-30.



  • Kadakçı Koca, T , Koca, M . (2014). Açık Ocak Albit İşletmesindeki Kaya Şevlerinin Sonlu Elemanlar Yöntemi Kullanılarak Duraylılık Değerlendirmesi . Jeoloji Mühendisliği Dergisi , 38 (1) , 1-18 . DOI: 10.24232/jeoloji-muhendisligi-dergisi.293044

  • Kadakçı Koca, T , Koca, M . Açık Ocak Albit İşletmesindeki Kaya Şevlerinin Sonlu Elemanlar Yöntemi Kullanılarak Duraylılık Değerlendirmesi. Jeoloji Mühendisliği Dergisi 38 (2014 ): 1-18

  • Importance of the Investigation of Slope Stability for Spoil Piles under Static Conditions: A Case from Yaylıktepe Site, Yeniköy Lignite Enterprises
    Hasan Karakul
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    ABSTRACT: The studies related the deposition of the spoil piles, which is obtained by mining excavation in openpit mines, and the reclamation of the depositional areas are very important to overcome the induceddestruction of the nature. A significant part of these studies is the investigation of the slope stability ofspoil piles. In this study, slope stability analyses have been performed for the spoil piles of the Sekköyopen pit mine in Muğla-Milas. Experimental results indicated that the spoil material includes nearlyequal amount of coarse and fine grains, and has low plasticity index. With the purpose of determiningthe mobilized shear strength parameters at the time of failure, back analyses have been performed forthe spoil pile failures observed in the study area. The comparison of data from the back analyses and thelaboratory tests reveals that residual strength values were mobilized at the time of failure for the spoilmaterial. By considering the data obtained and the field observations, one and multi-bench economicaland safe slope design analyses have been performed for the spoil piles in the study area in accordancewith the rules in the regulation on reclamation of the sites destructed by mining applications. Accordingto the results of the analyses for 10, 20 and 30 m slope heights, 20-40° and 19° overall slope angle valueswere determined for one and multi-bench slopes, respectively

  • Residual strength

  • Back analysis

  • Spoil

  • Plasticity index

  • Slope stability

  • Apaydın, N., Ulusay, R., 1990. TKİ-GELİ Milas Sekköy Açık İşletmesi Jeoteknik Etüdü Sonuç Raporu. MTA Derleme No. 8955, 114 s (yayımlanmamış).

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  • Demirbugan, A., Karakul, H., Avcı, K., 2013. Maden Sahalarının Doğaya Yeniden Kazandırılması Yeniköy Linyitleri İşletmesi (YLİ) Yaylıktepe Sahası Örneği. MTA Derleme No. 11618, 131 s (yayımlanmamış).

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  • Kaşmer, Ö., Ulusay, R., 2006. Stability of spoil piles at two coal mines in Turkey: geotechnical characterization and design considerations. Environmental and Engineering Geoscience, 12 (4), 337–352.

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  • Yiğitel, İ., 1978. Muğla-Milas kömürlü Neojeni Sekköy sektörü. jeoloji raporu, MTA Enerji Hammaddeleri Dairesi Raporu, 15 s. (yayımlanmamış).

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  • Karakul, H . (2014). Pasa Yığınları için Statik Koşullarda Şev Duraylılığının Araştırılmasının Önemi: Yeniköy Linyitleri İşletmesi Yaylıktepe Sahası Örneği . Jeoloji Mühendisliği Dergisi , 38 (1) , 19-38 . DOI: 10.24232/jeoloji-muhendisligi-dergisi.2

  • Karakul, H . Pasa Yığınları için Statik Koşullarda Şev Duraylılığının Araştırılmasının Önemi: Yeniköy Linyitleri İşletmesi Yaylıktepe Sahası Örneği. Jeoloji Mühendisliği Dergisi 38 (2014 ): 19-38

  • Investigation of Geological and Geomechanical Properties of the Saraftepe (Trabzon) Tephritic Sill
    Hakan Ersoy Bülent Yalçinalp Ali Erden Babacan
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    ABSTRACT: Almost all granite, gabbro and basalt quarries have been abandoned in the last ten years, especiallyin the eastern Black Sea Region because of high operation costs and cheap hard rock entrance to Turkeyfrom the countries such as China and India. In the study, the Saraftepe hard rock quarry in the TrabzonCity was selected as a pilot site for encouraging and developing the hard rock production in the region,and the formation condition and geological properties of the operated tephrites in the quarry wereinvestigated. Thickness of the operating tephrite varies between 25 and 30 meters and it crops out along750 meters. This tephrite sill intruded in the N70E/25NW directed limestone, marl, sandstone and tufflayers. Geomechanical properties of the tephrite samples were investigated and some laboratory testswere conducted on the rock samples obtained from different zones because there is an anisotropic structurefrom top to bottom in the sill. The result of the conducted tests on the rock samples obtained from thedifferent zones show that their uniaxial compressive strength values are between 87 and 130 MPa, p-wavevelocities are between 5048 and 5642 m/s, density values are between 2.58 and 2.68 g/cm3, apparentporosity values are between 2.77 and 4.54 % and water absorption by weight are between 1.04 and 1.78%. The weight lost at the end of the freezing-thawing test and wetting-drying tests are 0.36 and 0.22 %,respectively. These test results shows there is % 10 strength loss at the end of the tests. Considering the allinvestigation results, the studied tephrite will contribute to the regional economy.  

  • Geomechanics

  • Marble

  • Tephrite

  • Trabzon

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  • Ketin, I., 1966. Anadolu’nun tektonik birliktelikleri. Maden Tetkik ve Arama Dergisi, 66, 23-34.

  • Korkmaz, S., Van, A., 1995. Trabzon kıyı bölgesinin stratigrafisi. Karadeniz Teknik Üniversitesi Jeoloji Mühendisliği Bölümü 30. Yıl Sempozyumu Bildiri Özleri, 107.

  • Korkmaz, S., 1993. Stratigraphy of The Tonya– Düzköy (Southwest of Trabzon). Türkiye Jeoloji Bülteni, 36–1, 151– 158.

  • Okay, A.I., Şahintürk, O., 1997. Geology of the eastern Pontides. Report of Regional and Petroleum Geology of the Black Sea and Surrounding Region, 68, 291– 311.

  • Özdemir, A., 2009. Kalecik (Gümüşhane) Travertenlerinin Fiziko-Mekanik Özellikleri ve Ekonomik Olarak Değerlendirilmesi. Karadeniz Teknik Üniversitesi Fen Bilimleri Enstitüsü, Trabzon, Yüksek Lisans Tezi, 69 s. (yayımlanmamış).

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  • Yılmaz, A.O, Çavuşoğlu, İ., Alp, İ., Kaya, R., Vıcıl, M., 2003. Doğu Karadeniz Bölgesi’nin doğaltaş potansiyeli ve doğaltaş işletmeciliği ile ilgili sorunlar. Türkiye IV. Mermer sempozyumu bildiriler kitabı, 435-448.

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  • Ersoy, H , Yalçınalp, B , Babacan, A . (2014). Saraftepe (Trabzon) Tefrit Silinin Jeolojik ve Jeomekanik Özelliklerinin Araştırılması . Jeoloji Mühendisliği Dergisi , 38 (1) , 39-50 . DOI: 10.24232/jeoloji-muhendisligi-dergisi.293153

  • Ersoy, H , Yalçınalp, B , Babacan, A . Saraftepe (Trabzon) Tefrit Silinin Jeolojik ve Jeomekanik Özelliklerinin Araştırılması. Jeoloji Mühendisliği Dergisi 38 (2014 ): 39-50

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