Computer modeling of the initial cavern for Beypazari Trona ore on the basis of leaching rates, insoluble contents and thickness of trona layer

Tunçay Saygun, İlkay
Trona ore located in Beypazarı is extracted by solution mining method with well pair connected by directional drilling technology. This thesis covers the determination of the dimensions of the initial (vertical) caverns formed in underground by use of a computer modeling (trademark: WinUbro/Poland) on the basis of horizontal and vertical leaching rates. The leaching rates were determined using the trona core samples from the ore deposit. The effect of insoluble content and the thickness of trona layer and solvent temperature on the initial cavern dimension were studied. The outcome of this study showed that the better the trona layer quality from the point of view of thickness and insoluble content, the wider the vertical cavern size is. In 1 m thick trona layer with 20% insolubles, it is possible to develop caverns of 6 m width, which is the minimum size for well pair connection. On the other hand, it is determined that the effective leaching time depends mainly on solvent temperature.


Production of heavy-media-quality magnetite concentrate from Kesikköprü iron ore tailings
Güngör, Kazım; Atalay, M Ümit; Department of Mining Engineering (2010)
The aim of this research was to investigate the possibility of the production of a magnetite concentrate which is suitable for preparation of heavy media from iron ore tailings of Güncem Mining Company magnetic separation facility. During the study, three different tailings named as low grade, medium grade and high grade with 5.91 % Fe3O4, 19.06 % Fe3O4 and 37.06 % Fe3O4, respectively, were used. Mineralogical analyses of test samples showed that magnetite and hematite were the major ore minerals while pyri...
Development of specimen geometries for mode i fracture toughness testing with disc type rock specimens
Alkılıçgil, Çiğdem; Tutluoğlu, Levent; Department of Mining Engineering (2010)
Flattened Brazilian disc and modified ring test methods are attractive methods being simpler compared to the other mode I fracture toughness testing methods on rock cores. The aim of this study is to improve these simple methods to yield fracture toughness values that are close to the ones determined by the suggested methods. ABAQUS finite element program was used to determine stress intensity factors of models with various dimensions. Comparing fracture toughness to the results obtained by semicircular ben...
Flooding analysis and slope stability assessment due to a confined aquifer in the Elbistan-Çöllolar open cast mine
Yoncacı, Selin; Tutluoğlu, Levent; Department of Mining Engineering (2009)
Groundwater can be a critical issue to be considered in civil engineering, mining engineering and interdisciplinary fields. Karstic structures and aquifers enclosing groundwater are potential risks in case they are not studied in detail. Enclosed groundwater can result in floods at pit bottom or can cause instabilities of permanent pit slopes. This study is about analyses of flooding possibility at the pit bottom and possible instabilities of pit slopes in the Elbistan-Çöllolar open cast coal mine due to th...
Development of a ventilation model for the g field of Çayırhan coal mine
İnan, Cem; Güyagüler, Tevfik; Department of Mining Engineering (2005)
Ventilation problems raised with the beginning of underground mining. In underground mining, to provide safe and healthy working conditions, ventilation should be designed properly. Especially in the planning stage of the project, to design ventilation properly is very important. The latest upgrade of the popular ventilation simulation program, known as VnetPC 2000, has been applied for the ventilation design. In this study simulation is conducted to both auxiliary and main ventilation at Çayirhan G Field. ...
Çubukbeli Tunnel, classification systems, rock mass strength parameters, excavation and support systems, finite element analysis
Karahan, Ercüment; Bilgin, Hasan Aydın; Department of Mining Engineering (2010)
In this thesis, suggestion of appropriate excavation and support systems and selection of rock mass strength parameters for the determination of these systems were carried out for the Çubukbeli Tunnel in Antalya. Çubukbeli Tunnel is a twin tube flute shaped tunnel with 1985 m length, 12 m width, 10 m height and maximum overburden thickness of 130 m. The tunnel area consists of limestone, clayey limestone, claystone, marl and siltsone. Rock mass classification systems are used for evaluation of rock mass cha...
Citation Formats
İ. Tunçay Saygun, “Computer modeling of the initial cavern for Beypazari Trona ore on the basis of leaching rates, insoluble contents and thickness of trona layer,” M.S. - Master of Science, Middle East Technical University, 2008.