Operational factors affecting maturity of units in the Beypazarı trona mine

Beşir, Tuğçe
Solution mining method is used for extracting trona ore from underground at the Beypazarı trona mine. Two vertical and one directionally drilled well are combined in a target trona seam as a production unit. Solvent containing 2-3 % Total Alkalinity at a temperature between 60-80 oC is injected from horizontal well and brine is taken from vertical wells with 14-15 % Total Alkalinity (TA) with a temperature of 40-50 oC. When brine concentration of units reaches design parameters, production unit is called as mature unit. There are some operational factors affecting the maturity of production unit. In this thesis, injection temperature and injection flow rate is observed as operational factors of production units depending on time. To see how operational factors, affect the increase of ing brine , 19 units were chosen from Beypazarı study area. At first, a regression analysis is done for the units, separately and then test is done for U6 trona seam to estimate maturity time of units with the help of operational and external factors. According to result of regression analysis, 10 of 19 units could be explained by the effect of injection temperature and flow rate depending on time with R2 (adj) is 56.8 % and it is estimated that units drilled in U6 trona seam can reach maturity level between 2,000-3,000 hours with 32 % R2 (adj) value.


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; Arol, Ali İhsan; Department of Mining Engineering (2008)
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 s...
Investigation of stress distribution in a dragline bucket using finite element analysis
Gölbaşı, Onur; Demirel, Nuray; Department of Mining Engineering (2011)
Overburden stripping is one of the essential activities in open-cast mines before starting the ore production. Due to the economic advantages, dragline is a widely utilized machinery in the overburden excavation. These earthmovers carry out the earthmoving process with dragging, hoisting and dumping actions of the bucket. Dragline excavator’s efficiency is critically important, since poor performance of a dragline in the mine site directly affects the total efficiency of ore production. Therefore, productiv...
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. ...
Fan and pitch angle selection for efficient mine ventilation using analytical hierachy process and neuro fuzzy approach
Taghizadeh Vahed, Amir; Demirel, Nuray; Güyagüler, Tevfik; Department of Mining Engineering (2012)
Ventilation is a critical task in underground mining operation. Lack of a good ventilation system causes accumulation of harmful gases, explosions, and even fatalities. A proper ventilation system provides adequate fresh air to miners for a safe and comfortable working environment. Fans, which provide air flow to different faces of a mine, have great impact in ventilation systems. Thus, selection of appropriate fans for a mine is the acute task. Unsuitable selection of a fan decreases safety and production ...
Comparative life cycle cost analysis of centrifugal and positive displacement pumps for mine dewatering
Aktaş, Ali Burak; Demirel, Nuray; Department of Mining Engineering (2015)
In mining activities, there is water flow to mining environment which must be removed by mine dewatering method to provide suitable working conditions. One of the ways of mine dewatering is conducted via pumps there mainly two types of pumps are being used in mine dewatering operations, centrifugal and positive displacement pumps. Centrifugal pumps utilize the submersible as feeder to horizontal pumps in main stations for further pumping to ponds or collection dams at surface, while positive displacement pu...
Citation Formats
T. Beşir, “Operational factors affecting maturity of units in the Beypazarı trona mine,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Mining Engineering., Middle East Technical University, 2019.