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Упит dcterms_subject_txt:bulldozers

2 items

  • The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers

    Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović (2019)
    One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability
    ... used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity ш таноп ој the continuous system јог the excavatioh ој coal апа tailings, which indicafes their importance. More than 100 bulldozers have been hired оп the ореп-сазт ...
    ... study of bulldozers Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers | Dragan ...
    ... ENVIRONMENTAL PROTECTION 25 - 28 September 2019, Vrdnik, Serbia THE OPTIMIZATION OF AUXILIARY MACHINERY IN OPEN-CAST LIGNITE MINES: A CASE STUDY OF BULLDOZERS Dragan Ignjatović!, Predrag Jovančić!, Stevan Đenadić!, Ivan Janković?, Ivica Ristović! !- University ог Belgrade – Faculty ог Mining and Geology ...

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... of three types of bulldozers that operate at the lignite mines. In the end, a comparison of the bulldozers is done. Conclusions can be used for maintenance, in logistics and during the purchasing of new machines. Keywords—availability, expert system, fuzzy theory, bulldozers I. INTRODUCTION ...
    ... max-min composition (1) IV. CASE STUDY: AVAILABILITY OF BULLDOZERS Availability of bulldozers operating on surface lignite mines of Electric Power Industry of Serbia, which operate as auxiliary machines, is analyzed. Three different bulldozers (Liebherr - Lib, Dressta – Drs, Caterpillar - Cat), at ...
    ... and supportability in the measure of availability is proposed. This model is based on fuzzy sets theory and it is implemented to three types of bulldozers that operate at the lignite mines. Obtained results are used for the improvement of maintenance and logistics procedures and additionally, could ...