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    Excavation and support design of the Dicle-Kralkizi water tunnel: an overview
    (Pergamon-Elsevier Science Ltd, 2005) Ayhan, M; Topal, E
    Tunneling projects have their uniqueness in terms of engineering problems. The expertise gained from analyzing these projects establishes a sound basis for future application. This paper conveys experiences gained during the construction and support of the design of the Dicle-Kralkizi water tunnel, Turkey. Tunnel stability problems including overbreaks and surface subsidence are evaluated. An analysis of the breakdowns, factors controlling advance rate and the overall performance of tunnel are covered. The accumulated information presented here is believed to be useful and reliable for a successful tunnel excavation in similar formations. (C) 2004 Elsevier Ltd. All rights reserved.
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    Öğe
    Implementing a production schedule at LKAB's Kiruna Mine
    (Informs, 2004) Kuchta, M; Newman, A; Topal, E
    LKAB's Kiruna Mine, located in northern Sweden, produces about 24 million tons of iron ore yearly using an underground mining method known as sublevel caving. To efficiently run the mills that process the iron ore, the mine must deliver planned quantities of three ore types. We used mixed-integer programming to schedule Kiruna's operations, specifically, which production blocks to mine and when to mine them to minimize deviations from monthly planned production quantities while adhering to operational restrictions. These production schedules save costs compared to schedules produced manually by meeting desired production quantities more closely and reducing employee time spent on preparing schedules.
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    Öğe
    New linear programming optimisation model for marble factory production
    (Industrial Diamond Review, 2005) Topal, E; Ayhan, M
    [Abstract Not Available]