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Упит dcterms_subject_txt:and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

1394 items

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

  • Coupling of artificial intelligence methods in the development of hybrid intelligent systems

    Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)
    In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...
    hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije
    ... complex mine ventilation network analysis. INVENTS is composed of a number of integrated software packages, which couple both well known numerical optimization and various artificial intelligence methods. By introducing heuristics into the knowledge base existing mathematical models are upgraded ...
    ... practice. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data ...
    ... global structure of the mathematical model for ventilation simulation in mine ventilation networks, transformed into the SimVent software package is composed of the following modules: 1) The module for the evaluation of air flow and pressure distribution in the ventilation system; 2) The module ...

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... developed for IBM PC and compatible computer systems. ResNet is a program that enables the calculation of aerodynamic resistance values on basis of measured ventilation parameters in underground mining workings. Aerodynamic resistance determined in such a way is the first and basic condition for the ...
    ... obtained. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data ...
    ... determining air flow distribution throughout the ventilation network, • simulation of climate conditions in mine chambers, • modeling of fire incidence in ventilation networks as well as • gas distribution in ventilation network. CFD INVENTS Data acquisition Design Im plem entation and m aintenance ...

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... developed for IBM PC and compatible computer systems. ResNet is a program that enables the calculation of aerodynamic resistance values on basis of measured ventilation parameters in underground mining workings. Aerodynamic resistance determined in such a way is the first and basic condition for the ...
    ... obtained. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network resistance ventilation system estimation ventilation simulation Design CFD Estimates estimation of gas and dust emission and temperature conditions flow process modelling using CFD Data ...
    ... determining air flow distribution throughout the ventilation network, • simulation of climate conditions in mine chambers, • modeling of fire incidence in ventilation networks as well as • gas distribution in ventilation network. CFD INVENTS Data acquisition Design Im plem entation and m aintenance ...

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...
    ... that enables mine ventilation simulation in un- derground exploitation of ore deposits. The global structure of the mathematical model used as the basis for SimVent is composed of the following: (i) a block for the analysis of air flow and pressure distribution in the ventilation network, (ii) a ...
    ... I. Obradović & R. Stanković CF D INV E NT S Data acquisition Design Im ple m e n t at io n an d m ain t e n an ce System monitoring Fig. 2. Global concept of mine ventilation planning and design. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX de f ining bas ic netw ...
    ... Yang, I. S. Lowndes and B. Denby, Genetic algorithm optimization of large UK coal mine ventilation network, Proc. 8th US Mine Ventilation Symp., 1998, 625-632. 13. Z. Y. Yang, I. S. Lowndes and B. Denby, Application of genetic algorithms to the optimization of large mine ventilation networks, Trans. Instn ...

  • Ventex: an expert system for mine ventilation systems analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    roblems relating to mine ventilation systems analysis are usually of a very complex nature. They involve the estimation of numerous interdependent parameters pertaining to the network status, ventilation status, ventilation system stability, air current losses, climate conditions, gas state, fire risk and dangerous dust pollution risk. The solution to these problems relies, to a great extent, on numerical methods. With the development of computer technology these methods were incorporated as numerical routes in software packages, such as the mine ...
    expert system, mine ventilation

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... SimVent for mine ventilation simulation developed at the Faculty of Mining and Geology of the University of Belgrade (Lilić, Stanković, and Obradović, 1994). This package, which enables the simulation of air flow distribution in a mine, the heat and fire transmission mechanisms, distribution of ...
    ... important and also most complex problems encountered in mine ventilation systems analysis is the evaluation of the general ventilation state of the mine. An appropriate and reliable solution for this problem is vital for the safety of the working process in mines with underground exploitation ...
    ... exploitation. Contemporary mining theory already operates with a number of mathematical methods which can be used to solve mine ventilation problems. These methods are used in current engineering practice with the help of appropriate software products. One of them is the software package SimVent ...

  • Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit

    Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina (2023)

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... fic energy efficiency design strategies focused on a wide range of passive design measures that integrated the technology related to necessary active systems from the conceptual design phase. Water management in these facilities is very dependent on water composition, flow and temperature yet needs ...
    ... communities. 3.2.3. Passive Design Strategies Striving for high level of energy efficiency and climate-responsive design, a series of passive design strategies were proposed to support the overall design goals. Placement and orientation: Placement of all open-air features and enclosed spaces was done ...
    ... The main design strategies, developed mainly based on bioclimatic architecture, [32] included • modularity, • sizing and positioning of open-air and indoor features, • passive design, and • use of on-site renewable energy sources. The general concept was developed with south-facing wellness and spa/medical ...

  • Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina

    Tina Dašić, Ljiljana Vasić (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... has been fully deployed yet. The design, development, and evaluation of high-performance adsorbents should be tightly coupled with evaluation of their practical performances and process considerations[34]. Moreover, cycle design, configuration, and optimization of any cyclic process should take ...
    ... AND STORAGE IN UNDERGROUND RESERVOIRS Professor: Vesna Karović-Maričić Student: John NyameR574/22 COMMISSION 1. Prof. Dr. Vesna Karović-Maričić Faculty of Mining and Geology 2. Prof.Dr. Branko Leković Faculty of Mining and Geology 3. Prof. Dr. Dušan Danilović Faculty of Mining and ...
    ... in developing the technologies and the need for enough facilities to transport and store CO-. Projects like the Boundary Dam carbon capture facility in Canada captures 1 million tons per year carbon emissions from the 150 MW coal power plant ensure safe and clean air. Blue hydrogen is an industry ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... CLOSURE AND RECLAMATION Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia radmila.gacinarpf.bg.ac.rs; bojan.dimitrijevicorgf.bg.ac.rs; sanja.bajicorgf.bg.ac.rs Abstract: Coal extraction in the form ofopen and underground methods ...
    ... annual air temperature in the wider area ranges from 10.6%C -12.3"C, the mean annual maximum air temperature is 16.0%C -18.0*C, and the mean annual minimum air temperature is from 5.9%C to 7.3"C [09]. The modern morphology of the terrain has been significantly changed. Surface mining of coal had the ...
    ... important and present the concern in the sense of the loss of surface area and space for living. The study on the environment has a basic description of the effects that are expected, and it is a basic document that serves for the design of mining activities. During the operation of coal mine, a large ...

  • Hibridni sistem za planiranje i analizu ventilacije rudnika

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilacija rudnika, informacioni sistemi
    ... Distribution Regulated Air Distribution Methods for Ventilation Network Solving……………………………………………….154 Hardy-Cross Method Application of Genetic Algorithms in Mine Ventilation Network Optimization Critical Path Method Modeling and Development of a Software Package for Defining Air Flow Distribution in ...
    ... for mine ventilation simulation obtained a key role in the process of mine ventilation planing and design. Numerous and divers artificial intelligence methods and techniques and rapid development of computer technology enable a construction of systems which both intertwine these methods and combine ...
    ... of mathematical and computer methods in mining. With an emphasis in mining, he explores the development of hybrid intelligent systems and the use of such systems for solving complex problems in the area of air pollution prediction. Ranka M. Stanković received the B.S. degree in mathematics from University ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... the same coal seam. Due to the fluctuation of the coal quality, mine planning and coal homogenization are in fact an optimization problem under uncertain conditions. To deal with these issues a stochastic optimization model is developed for an illustrative coal homogeniza- tion problem. Mining block grades ...
    ... physical and geological constraints, policies and mining methods. The basic data required in any operational planning are coal quality and capacity. Difficulties in optimum production schedule are caused by variability of grade and inability to accurately predict grades of smaller mining units. Therefore ...
    ... holes and use this data to develop MinexTM coal quality seam models to map the variability associated with the in situ qualities. Generation of multiple equally probable models via Rsim. (2) After its construction, a mini block model is used for mining planning and scheduling. For a given mining schedule ...

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... Equipment and Technology, Potsdam, Germany, 2009, 1, pp. 43-50 2] Petrović, D., Calculation of Underground Coal Gasification in Non-Balance Coal Reserves, Study of UCG through Possibility of Application in Out of Balance Coal Reserves in BiH, in Serbian, Ph. D. thesis, Faculty of Mining, Geology ...
    ... economics and environmental issues. When it comes to energy efficiency, it is appropriate to reference that with traditional mining (e. g. in underground coal mining), coal utilization is no more than 20-25%, while in UCG it is about 72-96%, taking into account the useful volume of coal. In addition ...
    ... , Drilling and Blasting (in Serbian), Faculty of Mining and Geology, Belgrade, Serbia, 1991 Vujasinovic, S., Groundwater Protection (in Serbian), Faculty of Mining and Geology, Belgrade, Serbia, 1982 Friedman, J., et. al., Site Selection for Environmental Concerns for Underground Coal Gasification ...

  • Effectiveness Analysis of Different Bucket-wheel Excavators

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić (2021)
    Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...
    bucket-wheel excavator, open-pit coal mine, mining, multi-criteria decision methods

  • Analysis of the exhaust emissions inventory from auxiliary mining machines

    Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)
    Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...
    emissions, mining, auxiliary machines

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation