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Slope stability analysis and design of open pit mine slopes for limestone mine at Aruwakkalu, Puttalam, Sri Lanka

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dc.contributor.author Kariyawasam, KMGS
dc.contributor.author Dauglas, DLPM
dc.contributor.author Amali, NPG
dc.contributor.author Samaradiwakara, GVI
dc.contributor.author Chaminda, SP
dc.contributor.author Hemalal, PVA
dc.contributor.author Jayawardena, CL
dc.contributor.editor Hemalal, PVA
dc.date.accessioned 2022-07-26T09:58:03Z
dc.date.available 2022-07-26T09:58:03Z
dc.date.issued 2016-07
dc.identifier.citation Kariyawasam, K.M.G.S., Dauglas, D.L.P.M., Amali, N.P.G., Samaradiwakara, G.V.I., Chaminda, S.P., Hemalal, P.V.A., Jayawardena, C.L. (2016). Slope stability analysis and design of open pit mine slopes for limestone mine at Aruwakkalu, Puttalam, Sri Lanka. In P.V.A. Hemalal (Ed.), Proceedings of the ERE 2016 Annual Conference on Earth Resources Management (pp. 41-46). Department of Earth Resources Engineering, University of Moratuwa. en_US
dc.identifier.uri http://dl.lib.uom.lk/handle/123/18474
dc.description.abstract The largest open pit limestone mine in Sri Lanka which belongs to Holcim Lanka Limited is located at Aruwakkalu, Puttalam. The sub-surface of this site is comprised of an overburden of average thickness 24 m followed by a 9 m thick low grade limestone layer and a high grade limestone layer at the bottom which extends even below the seawater level.The overburden which is currently being excavated in five benches of near vertical cuts becomes unstable during the rainy season, which is a significant safety issue on this site. In this scientific investigation, the physical properties of each layer of material are determined by laboratory testing, in order to design optimum bench heights and slope angles for this open cast mine. Direct shear tests are carried out on undisturbed soil samples collected from the overburden, whereas rock-triaxial tests are carried out on the samples collected from low-grade and high-grade limestone layers, in order to determine design parameters: cohesion(c) and friction angle(ϕ) of these materials. The stability analysis is carried out by means of “SLOPE/W” software. The analysis of data for a three layer model reveals that the possible failures are confined to the overburden based on the outcome of this study. The overburden mine slopes could be optimized to three berms of each 8 m height, 6 m wide and of 700 slopes, having a sufficient safety factor which will enhance the safety and productivity of the future mining operations on this site. en_US
dc.language.iso en en_US
dc.publisher Department of Earth Resources Engineering en_US
dc.subject Benching optimisation en_US
dc.subject Limestone en_US
dc.subject Open cast mining en_US
dc.subject Slope stability en_US
dc.title Slope stability analysis and design of open pit mine slopes for limestone mine at Aruwakkalu, Puttalam, Sri Lanka en_US
dc.type Conference-Full-text en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Earth Resources Engineering en_US
dc.identifier.year 2016 en_US
dc.identifier.conference ERE 2016 Annual Conference on Earth Resources Management en_US
dc.identifier.place Katubedda en_US
dc.identifier.pgnos pp. 41-46 en_US
dc.identifier.proceeding Proceedings of the ERE 2016 Annual Conference on Earth Resources Management en_US
dc.identifier.email drsamaradivakara@gmail.com en_US
dc.identifier.email chulanthaj@uom.lk en_US


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