![]() ![]() Results of the friction angles were compared in order to check the effectiveness of commonly used 2D approaches in handling the slope problems. By back analyses of a large scale slope failure, mobilized friction angles for a critical weak clay layer under the lignite seam were determined accurately by using the 2D limit equilibrium method and 3D finite difference models. ![]() The basic input parameters, cohesion and friction angle, were determined in the soil mechanics laboratory. This study presents the results of slope stability analysis via finite difference code and a limit equilibrium software for the soil slopes of the Elbistan–Çöllolar lignite mine. Field investigations, laboratory testing and back analyses are vital instruments for the input parameters. Input parameters for slope stability analysis are essential, and so they must be determined accurately and precisely. The new mine will meet the coal consumption of the Elbistan B power plant. ![]() The new Çöllolar opencast mine is in the Afsin–Elbistan lignite basin, and this mine will be the second mining activity in the basin after the active Kışlaköy opencast mine. The Afşin–Elbistan lignite basin, containing 47% of the overall lignite reserve in Turkey, lies in the Afşin and Elbistan districts as a part of Kahramanmaraş. With about 9.3 billion tons of reserve, lignite is a major source for energy production in Turkey. ![]()
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