Abstract
The Akçakale Cave is located in the vicinity of the Arsa neighborhood within the boundaries of the Akçakale village, Gümüşhane, Turkey. The cave is rich in cave formations (stalactite, stalagmite, cave pearl, cave flower, wall travertines). Thus, the appropriateness of opening the cave to visitors to boost tourism is of importance for the local and national economy. This study analyzes the stability of the Akçakale Cave using a numerical analysis method. According to the results of the total displacement analysis, there are displacements in the entrance, ceiling, and sidewalls of the cave ranging from 1 mm to 48 mm. It seems that the entrance, ceiling, and sidewalls of the cave face a high risk of local or sudden collapse. According to the deformation analysis of the length section of the cave examined, local collapses may occur especially in the first 75 m from the entrance of the cave. We believe that this situation would not carry a risk for the Arsa neighborhood for now. In conclusion, the results of the stability analysis and in-situ observations showed clear evidence of former and ongoing cave-ins (collapses) and the Akçakale Cave faces a high risk of local or sudden collapse. Thus, although the Akçakale Cave is one of the most prominent karst caves in Turkey, it seems to be not appropriate to open the cave to tourist visits.
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References
Alemdag S, Gurocak Z, Solanki P, et al. (2008) Estimation of bearing capacity of basalts at Atasu dam site, Turkey. Bulletin of Engineering Geology and the Environment 67(1): 79–85. https://doi.org/10.1007/s10064-007-0112-3
Alemdag S, Gurocak Z, Gokceoglu C (2015) A simple regression based approach to estimate deformation modulus of rock masses. Journal of African Earth Sciences 110: 75–80. https://doi.org/10.1016/j.jafrearsci.2015.06.011
Alemdag S (2015) Assessment of bearing capacity and permeability of foundation rocks at the Gumustas waste dam site, (Turkey) using empirical and numerical analysis. Arabian Journal of Geosciences 8: 1099–1110. https://doi.org/10.1007/s12517-013-1236-3
Bieniawski ZT (1989) Engineering rock mass classification. New York: Wiley Interscience.
Bostanci HT, Alemdag S, Gurocak Z, et al. (2018) Combination of discontinuity characteristics and GIS for regional assessment of natural rock slopes in a mountainous area (NE Turkey). CATENA 165: 487–502. https://doi.org/10.1016/j.catena.2018.03.005
Chun BS, Lee YJ, Seo DD, et al. (2006) Correlation deformation modulus by PMT with RMR and rock mass condition. Tunnelling and Underground Space Technology 21: 231–232. https://doi.org/10.1016/j.tust.2005.12.011
Çanakcı H, Güllü H (2009) Development of a hazard assessment model for near surface caves in limestone. Engineering Geology 105: 102–107. https://doi.org/10.1016/j.enggeo.2008.12.004
Gokceoglu C, Sonmez H, Kayabasi A (2003) Predicting the deformation moduli of rock masses. International Journal of Rock Mechanics and Mining Sciences 40: 701–710. https://doi.org/10.1016/S1365-1609(03)00062-5
Gurocak Z, Solanki P, Zaman MM (2007) Empirical and numerical analyses of support requirements for a diversion tunnel at the Boztepe dam site, eastern Turkey. Engineering Geology 91: 194–208. https://doi.org/10.1016/j.enggeo.2007.01.010
Gurocak Z, Alemdag S, Zaman M (2008) Rock slope stability and excavatability assessment of rocks at the Kapikaya Dam site, Eastern Turkey, Engineering Geology 96(1–2): 17–27. https://doi.org/10.1016/j.enggeo.2007.08.005
Gurocak Z, Alemdag S, Bostanci HT, et al. (2017) Discontinuity controlled slope failure zoning for a granitoid complex: A fuzzy approach. In: Xia TF (Ed). Rock Mechanics and Engineering, London, UK. pp 1–25. https://doi.org/10.4324/9781315708119
Hoek E, Carranza-Torres C, Corkum B (2002) Hoek-Brown criterion e 2002 edition. In: Hammah R, Bawden W, Curran J, Telesnicki M (eds.), Mining and tunnelling innovation and opportunity, proceedings of the 5th North American rock mechanics symposium and 17th tunnelling association of Canada conference. Toronto, Canada. pp 267–273.
Hoek E, Diederichs MS (2006) Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and Mining Sciences 43: 203–215. https://doi.org/10.1016/j.ijrmms.2005.06.005
Hoek E, Carter TG, Diederichs MS (2013) Quantification of the Geological Strength Index chart. 47th US Rock Mechanics and Geomechanics Symposium, San Francisco, 1–9.
ISRM (2007) The complete ISRM suggested methods for rock characterization, testing and monitoring: 1974–2006. Suggested Methods prepared by the Commission on Testing Methods, ISRM, R. Ulusay and J.A. Hudson (Ed.), Kozan Ofset, Ankara. p 628.
Kandemir R, Yilmaz C (2009) Lithostratigraphy, facies, and deposition environment of the Lower Jurassic Ammonitico Rosso type sediments (ARTS) in the Gumushane area, NE Turkey: Implications for the opening of the northern branch of the Neo-Tethys ocean. Journal of Asian Earth Sciences 34: 586–598. https://doi.org/10.1016/j.jseaes.2008.08.006
Kanik M, Gurocak Z, Alemdag S (2015) A comparison of support systems obtained from the RMR89 and RMR14 by numerical analyses: Macka Tunnel project, NE Turkey. Journal of African Earth Sciences 109: 224–238. https://doi.org/10.1016/j.jafrearsci.2015.05.025
Kanik M and Gurocak Z (2018) Importance of numerical analyses for determining support systems in tunneling: A comparative study from the trabzon-gumushane tunnel, Turkey. Journal of African Earth Sciences 143: 253–265. https://doi.org/10.1016/j.jafrearsci.2018.03.032
Kaya A, Bulut F, Alemdağ S, et al. (2011) Analysis of Support Requirements for a Tunnel Portal in Weak Rock: A Case Study in Turkey. Scientific Research and Essays 6(31): 6566–6583. https://doi.org/10.5897/SRE11.1691
Kaya A, Karaman K, Bulut F (2017) Geotechnical investigations and remediation design for failure of tunnel portal section: a case study in northern Turkey. Journal of Mountain Science 14(6): 1140–1160. https://doi.org/10.1007/s11629-016-4267-x
Khabbazi A, Ghafoori M, Lashkaripour GR, et al. (2013) Estimation of the rock mass deformation modulus using a rock classification system. Geomechanics and Geoengineering 8(1): 46–52. https://doi.org/10.1080/17486025.2012.695089
Li XH, Zhang QS, Zhang X, et al. (2018) Detection and treatment of water inflow in karst tunnel: A case study in Daba tunnel. Journal of Mountain Science 15(7): 1585–1596. https://doi.org/10.1007/s11629-018-4919-0
Mahanta B, Singh HO, Singh PK, et al. (2016) Stability analysis of potential failure zones along NH-305, India. Natural Hazards 83(3): 1341–1357. https://doi.org/10.1007/s11069-016-2396-8
Northup De, Lavoie Kh (2001) Geomicrobiology of Caves: A Review. Geomicrobiology Journal 18: 199–222. https://doi.org/10.1080/01490450152467750
Northup De, Barns Sm, Yu Le, et al. (2003) Diverse microbial communities inhabiting ferromanganese deposits in Lechuguilla and Spider Caves. Environmental Microbiology 5(11): 1071–1086. https://doi.org/10.1046/j.1462-2920.2003.00500.x
Pelin S (1977) Alucra (Giresun) güneydoğu yöresinin petrol olanakları bakımından jeolojik incelemesi, KTÜ, No 87.
Rocscience (2011) Phase2 v8.0 finite element analysis for excavations and slopes. Rocscience Inc., Toronto, Ontario, Canada.
Uzun A, Zeybek Hİ, Yılmaz C, et al. (2015) Travertine Caves in the Aksu Creek Drainage Basin, Giresun, Marmara Coğrafya Dergisi 31: 243–257. https://doi.org/10.14781/mcd.95521
Uzun A, Zeybek Hİ (1996) The Akçakale Cave (Gümüşhane), Turkish Geographical Review 31(1): 39–53.
Wu GJ, Chen WZ, Yuan JQ, et al. (2017) Formation mechanisms of water inrush and mud burst in migmatite tunnel: A case study in China. Journal of Mountain Science 14(1): 188–195. https://doi.org/10.1007/s11629-016-4070-8
Zeybek Hİ (2010) Karstification and karstic forms in the southerneast part of the Canik Mountains. Eastern Geographical Review 15(24): 273–288.
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The authors would like to thank Lecturer Mehmet Akif Marabaoğlu and Dr. Mahmut Sarı for technical review of the language and arrangement of figures.
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Alemdag, S., Zeybek, H.I. & Kulekci, G. Stability evaluation of the Gümüşhane-Akçakale cave by numerical analysis method. J. Mt. Sci. 16, 2150–2158 (2019). https://doi.org/10.1007/s11629-019-5529-1
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DOI: https://doi.org/10.1007/s11629-019-5529-1