Linear Programming to Solve Coal Blending Problem

1780 Words8 Pages
17th International Mining Congress and Exhibition of Turkey- IMCET 2001, © 2001, ISBN 975-395-417-4

Optimum Blending of Coal by Linear Programming for the Power Plant at Seyitömer Coal Mine
K.Erarslan, H.Aykul, H.Akçakoca & N.Çetin
Dumlupınar University, Department of Mining Engineering, 43100, Kütahya, Turkey

ABSTRACT: In this study, a linear programming model is developed to determine the optimum coal blend in terms of quality and quantity. Coal with various features is mined from different panels of Seyitömer Lignite Coal District and fed to a nearby power plant. The quality of the coal is extremely variable through the horizontal and vertical directions, which entails the precise planning of coal blending during the mining and
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The basin is characterized as Late Miocene-early Pliocene. The lignite seams in Seyitömer basin consist of two horizontal levels (0-7° S), referred to as A and B seams, according to their depths. The seams are separated from each other by waste interbedded formations whose thickness vary from 10 to 50 m. These two seams may exhibit variation according to their occurrence in three sub-regions (Seyitömer, Aslanlı, Ayvalı), where the geological coal formation has been determined by drill holes. The thickness of the A seam, located at the top level of the basin, varies in the range of 5-25 m. {Sofrelec, 1967). The thickness of B seam varies in the range of 2-30 m. In the basin, these two seams are rarely observed together. The seam defined as A İs deposited only in the Seyitömer region and the coal occurrences in the Aslanlı and Ayvalı regions. The B seam consists of 3 different sublevels, referred to, from Üie top to the base of the seam, as B[, B2, Bj Their calorific values decrease towards to the seam base as the interbedded layers get thicker. The upper level coal seams B| and B2, which have a high calorific value and are produced in sorted size and quality (+100 mm), have supplied the market for public heating. The B3 coal, which is of low quality and contains fine coal (-100 mm) from the processing plant, is sold to the power plant. At the enterprise, production is performed by the open pit mining method. The overburden, whose thickness varies from 35 to 60 m., is

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