Vrnja�ka Banja, Serbia

11th INTERNATIONAL CONFERENCE �RESEARCH AND DEVELOPMENT IN

MECHANICAL INDUSTRY�

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Editor:

Predrag V. Daši�

Sokobanja, Serbia 15 - 18. September 2011.

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Publisher: SaTCIP (Scientific and Technical Center for Intellectual Property) Ltd.,

36210 Vrnja�ka Banja, Serbia For publisher: Jovan Daši�, Director of the firm SaTCIP Ltd. Reviewers: Prof. dr. Branislav Dragovi�, vice-dean, Maritime Faculty, University of

Montenegro, Kotor (Montenegro) Prof. dr Sergey Kovalevskyy, vice-rector, Donbass State Machinery Academy

(DSMA), Kramatorsk (Ukraine) Prof. dr Raycho Ilarionov, vice-rector, Technical University of Gabrovo

(Bulgaria) Technical processing and design: Predrag Daši� Jovan Daši� Sanja �ali� Approved by: Decision no. 015/2011 from 01-06-2011 from SaTCIP Ltd., Vrnja�ka Banja (Serbia) Disclaimer Note The content of this publication, data, discussions and conclusions presented by the authors are for information only and are not intended for use without independent substantiating investigations on the part of potential users. Opinions expressed by the Autors are not necessarily in accordance with SaTCIP Ltd. as the Publisher, and the organizer and editor are not responsible for any statement in this publication. Copyright © 2011 SaTCIP Ltd. All rights are reserved for this publication, which is copyright according to the International Copyright Convention. Excepting only any fair dealing for the purpose of private study, research, review, comment and criticism, no part of this publication can be reproduced, stored in a retrieval system, or transmitted in any form or by any means, mechanical, electrical, electronic, optical, photocopying, recording or otherwise, without the prior expressly permission of the copyright owners. Unlicensed copying of the contents of this publication is illegal. Circulation: 80 exemplars Printed by: SaTCIP (Scientific and Technical Center for Intellectual Property) Ltd.

36210 Vrnja�ka Banja, Serbia

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ORGANIZER

Vrnja�ka Banja, Serbia http://www.satcip.com/

ORGANIZING COMMITTEE 1. Predrag Daši�, SaTCIP Ltd., Vrnja�ka Banja (Serbia), Chairman 2. Dr Milutin Milosavljevi�, University of Priština – Office Kosovska Mitrovica, Technical

Faculty, Kosovska Mitrovica (Serbia) 3. Marina Stanojevi�, University of Niš, Faculty of Economics, Niš (Serbia) 4. Dr Slobodan Radosavljevi�, Mining Basin �Kolubara�, Lazarevac (Serbia) 5. Veis Šerifi, Technical Faculty, �a�ak (Serbia) 6. Jovan Daši�, SaTCIP Ltd., Vrnja�ka Banja (Serbia) 7. Danka Mili�evi�, SaTCIP Ltd., Vrnja�ka Banja (Serbia) 8. Sanja �ali�, SaTCIP Ltd., Vrnja�ka Banja (Serbia)

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SCIENTIFIC COMMITTEE 1. Prof. dr Grigoryev Sergey Nikolaevich, rector, Moscow State Technological University �STANKIN�,

Moskva (Russia), Chairman 2. Prof. dr Valentin Nedeff, rector, University of Bac�u, Faculty of Engineering, Bac�u (Romania), Vice-

chairman 3. Prof. dr Friedrich Franek, University of Vienna and president of Austrian Tribology Association, Vienna

(Austria), Vice-chairman 4. Prof. dr Raycho Ilarionov, vice-rector, Technical University of Gabrovo (Bulgaria), Vice-chairman 5. Dr Syed Ahmed, CSEM S. A., Surface Engineering Division, Neuchâtel (Switzerland) 6. Prof. dr Emilia Assenova, Technical University of Sofia, Sofia (Bulgaria) 7. Prof. dr Anatoly P. Avdeenko, Donbass State Machinery Academy, Kramatorsk (Ukraine) 8. Prof. dr Milun Babi�, University of Kragujevac, Faculty of Mechanical Engineering, Kragujevac (Serbia) 9. Prof. dr Nada Barac, University of Niš, Faculty of Economics, Niš (Serbia) 10. Prof. dr Rade Bio�anin, University of Novi Pazar, Technical Faculty, Novi Pazar (Serbia) 11. Prof. dr Leonid Borisenko, Belarusian-Russian University (BRU), Mogilev (Belarus) 12. Prof. dr Konstantin D. Bouzakis, Aristoteles University of Thessaloniki, Faculty of Mechanical

Engineering, Thessaloniki (Greece) 13. Prof. dr Miodrag Bulatovi�, University of Podgorica, Faculty of Mechanical Engineering, Podgorica

(Montenegro) 14. Prof. dr Traian Buido�, University of Oradea, Faculty of Management and Technological Engineering,

Oradea (Romania) 15. Prof. dr Mikhail V. Burmistr, academician, rector, Ukrainian State University of Chemical Engineering,

Dniepropetrovsk (Ukraine) 16. Prof. dr Alexander I. Burya, academician, Dniepropetrovsk State Agrarian University, Dniepropetrovsk

(Ukraine) 17. Prof. dr Ilija �osi�, dean, University of Novi Sad, Faculty of Technical Scientific, Novi Sad (Serbia) 18. Prof. dr Predrag �osi�, University of Zagreb, Faculty of Mechanical Engineering Naval Architecture,

Zagreb (Croatia) 19. Prof. dr George Dobre, University Politehnica, Bucharest (Romania) 20. Prof. dr Alexandre Dolgui, Ecole Nationale Supérieure des Mines de Saint-Etienne, Saint-Etienne (France) 21. Prof. dr �emal Doli�anin, rector, University of Novi Pazar, Technical Faculty, Novi Pazar (Serbia) 22. Prof. dr. Branislav Dragovi�, vice-dean, Maritime Faculty, University of Montenegro, Kotor (Montenegro) 23. Prof. dr Ljuben Dudesku, vice-dean, University of Skopje, Faculty of Mechanical Engineering, Skopje

(Macedonia) 24. Prof. dr Petru Dusa, Technical University �Gh. Asachi�, Faculty of Mechanics, Ia�i (Romania) 25. Prof. dr Ljubodrag �orevi�, College of Applied Mechanical Engineering, Trstenik (Serbia) 26. Prof. dr Vladan �orevi�, academician, University of Belgrade, Faculty of Mechanical Engineering,

Belgrade (Serbia) 27. Prof. dr Sabahudin Ekinovi�, rector, University of Zenica, Faculty of Mechanical Engineering, Zenica

(Bosnia and Herzegovina) 28. Prof. dr Volodymir Fedorinov, rector, Donbass State Machinery Academy, Kramatorsk (Ukraine) 29. Prof. dr Milomir Gaši�, University of Kragujevac, Faculty of Mechanical Engineering, Kraljevo (Serbia) 30. Prof. dr Manfred Geiger, University Erlangen-Nuremberg, Erlangen (Germany) 31. Prof. dr Anatoly Ivanovich Grabchenko, National Technical University, Kharkov Polytechnical Institute,

Kharkov (Ukraine) 32. Prof. dr Nicolae Valentin Ivan, University Transilvania of Brasov, Faculty of Mechanical Engineering,

Brasov (Romania) 33. Prof. dr Isak Karabegovi�, dean, University of Biha�, Technical Faculty, Biha� (Bosnia and Herzegovina) 34. Prof. dr Baki Karami�, Erciyes University, Faculty of Mechanical Engineering, Kaysei (Turkey) 35. Prof. dr Branko Katalini�, University of Vienna, Vienna (Austria) 36. Prof. dr Veijo Kauppinen, Helsinki University of Technology, Espoo (Finland)

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37. Prof. dr Marianna Kazimierska - Grebosz, Technical University of Lodz, Faculty of General Mechanics, Lodz (Poland)

38. Dr Sergei A. Klimenko, Director of Association of Mashine – Bulding Technologists of the Ukraine - ATMU, Kiev (Ukraine)

39. Prof. dr Karel Kocman, Technical University of Brno, Brno (Szech Republic) 40. Prof. dr Janez Kopac, University of Ljubljana, Faculty of Mechanical Engineering, Ljubljana (Slovenia) 41. Prof. dr Marian Kralik, vice-dean, Slovak University of Technology, Faculty of Mechanical Engineering,

Bratislava (Slovakia) 42. Prof. dr Zdravko Krivokapi�, vice-dean, University of Podgorica, Faculty of Mechanical Engineering,

Podgorica (Montenegro) 43. Prof. dr Janos Kundrak, University of Miskolc, Faculty of Production Engineering, Miskolc, (Hungary) 44. Prof. dr Cristian N. Madu, Pace University, Lubin School of Bussiness, New York (USA) 45. Prof. dr Velibor Marinkovi�, University of Niš, Faculty of Mechanical Engineering, Niš (Serbia) 46. Prof. dr Vlatko Maruši�, University of Osijek, Mechanical Engineering Faculty, Slavonski Brod (Croatia) 47. Prof. dr Ostoja Mileti�, vice-rector, University of Banja Luka, Faculty of Mechanical Engineering, Banja

Luka (Bosnia and Herzegovina) 48. Prof. dr Onisifor Olaru, dean, University �Constantin Brancusi� of Tg-Jiu, Faculty of Engineering, Tg-Jiu

(Romania) 49. Prof dr Constantin Oprean, rector, �Lucian Blaga� University of Sibiu, Sibiu (Romania) 50. Prof. dr Liviu Palaghian, vice-dean, University of Galati, Galati (Romania) 51. Prof. dr. Nam Kyu Park, Tongmyong University, Busan (Korea) 52. Prof. dr Jozef Peterka, vice-dean, Slovak University of Technology, Faculty of Material Sciences and

Technology of Trnava, Trnava (Slovakia) 53. Prof. dr Narcisa Popescu, University �Politehnica�, Bucharest (Romania) 54. Prof. dr Stanislaw Pytko, Technical University of Krakow, Krakow (Poland) 55. Prof. dr Snežana Radonji�, vice-dean, University of Kragujevac, Technical Faculty, �a�ak (Serbia) 56. Prof. dr Miroslav Radovanovi�, University of Niš, Faculty of Mechanical Engineering, Niš (Serbia) 57. Prof. dr Georgi Rashev, dean, Technical University of Gabrovo, Faculty of Mechanical Engineering,

Gabrovo (Bulgaria) 58. Prof. dr. Dong-Keun Ryoo, College of International Studies, Korea Maritime University, Busan (Korea) 59. Prof. dr Igor Sergeevich Sazonov, rector, Belarusian-Russian University (BRU), Mogilev (Belarus) 60. Prof. dr Adolfo Senatore, University of Salermo, Faculty of Mechanical Engineering, Fisciano (Italy) 61. Prof. dr Dimitri Yu. Skubov, State Technical University of Sankt Petersburg, Sankt Petersburg (Russia) 62. Prof. dr Georgy Slynko, academician, Zaporozhye National Engineering University, Zaporozhye (Ukraine) 63. Prof. dr Mirko Sokovi�, vice-dean, University of Ljubljana, Faculty of Mechanical Engineering, Ljubljana

(Slovenia) 64. Prof. dr Viktor Starkov, Moscow State Technological University, Moscow (Russia) 65. Prof. dr Ljubodrag Tanovi�, University of Belgrade, Faculty of Mechanical Engineering, Belgrade (Serbia) 66. Prof. dr Oleg Vasilevich Taratynov, academician, Moscow State Industrial University, Moscow (Russia) 67. Prof dr Mihail Titu, �Lucian Blaga� University of Sibiu, director of Intellectual Property Department, Sibiu

(Romania) 68. Prof. dr Mirela Toth-Tascau, Politehnica University of Timi�oara, Faculty of Mechanical Engineering,

Timi�oara (Romania) 69. Prof. dr Nikolaos Vaxevanidis, Institute of Pedagogical & Technological Education, N. Heraklion Attikis

(Greece) 70. Prof. dr Karol Velisek, Slovak University of Technology, Faculty of Material Sciences and Technology of

Trnava, Trnava (Slovakia) 71. Prof. dr Nataliya Vodolazskaya, vice-dean, Donetsk National Technical University (DNTU), Donetsk

(Ukraine) 72. Prof. dr Edward Walicki, University of Zielona Gora, Faculty of Mechanics, Zielona Gora (Poland) 73. Prof. dr Ton vad der Wiele, Erasmus University, Rotterdam School of Management, Rotterdam

(Netherlands) 74. Prof. dr Carol Zoller, University of Petrosani, Faculty for Mechanical and Electrical Engineers, Petrosani

(Romania) 75. Prof. dr Dragan Živkovi�, High Technical School, Zrenjanin (Serbia)

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VII

P R E F A C E The First Conference �Research and Development in Chemical and Mechanical Industry� - RaDMI 2001 was held upon the initiative of Predrag Daši� and prof. dr Miroslav Radovanovi� in Kruševac from October 22-24, 2001. Until now, 9 conferences were realized. The conference accepted and published over 1.700 papers, from which 1.200 were from abroad from 40 various countries of the world. Total number of authors and coauthors is over 2.000. Papers of the 10th conferences were published in 18 proceedings in hard copy and 9 proceedings in electronic form (CD-ROM). Amount of printed material was approximately 12.000 pages. Some papers from the 8th International conference RaDMI 2008 will be printed in special issue of international journal from SCI-E paper �Strojniški Vestnik – Journal of Mechanical Engineering� Vol. 55, no. 2 (2009) (Web site: http://en.sv-jme.eu/). Eleventh International Conference �Research and Development in Mechanical Industry� RaDMI 2011 will be held on 15–18th September 2011 in Sokobanja, Serbia. Topics of the Conference RaDMI 2011 are:

� Plenary Session: Invitation papers, with 12 papers� � Session A: Research and development of manufacturing systems, tools and technologies, new

materials and production design, with 39 papers� � Session B: Transport systems and logistics, with 8 papers� � Session C: Application of information technologies in mechanical engineering, with 29 papers; � Session D: Quality management, ISO 9000, ISO 14000, TQM and management in mechanical

engineering, with 65 papers; � Session E: Application of mechanical engineering in other industrial fields, with 48 papers.

The aim of organizing the Conference is: animating scientists from the faculties and institutes and experts from the industry and their connecting and collaboration, and exchanging the experiences and knowledge of domestic and foreign scientists and experts. On behalf of the organizers, we would like to extend our thanks to all organizations and institutions that have supported the initiative to have this anniversary gathering organized. We would also like to extend our thanks to all authors and participants from abroad and from the country for contribution to this conference. Sokobanja, September 2011. CHAIRMAN OF ORGANIZING COMMITTEE

Predrag Daši�, prof.

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C O N T E N T S

Volume 1

PLENARY SESSION (INVITATION PAPERS)

P-1. Fountas N.A., Vaxevanidis N.M. (Attikis – Greece) IDENTIFICATION OF CAM PARAMETERS FOR THE OPTIMIZED ROUGH MACHINING OF COMPLEX PARTS THROUGH DESIGN OF EXPERIMENTS

1

P-2. Klu�ka R., Sivera M. (Ostrava - Czech Republic), Senatore A. (Salerno, Italy) MODAL ANALYSIS OF CENTRIFUGALLY TENSIONED AIRSCREW: NUMERICAL SOLUTION AND TEST DESIGN

11

P-3. Bošnjak M.S., Petkovi� D.Z., Dunji� M.M., Gnjatovi� B.N., �or�evi� D.M. (Belgrade – Serbia) REDESIGN OF THE VITAL SUBSYSTEMS AS A WAY OF EXTENDING THE BUCKET WHEEL EXCAVATORS LIFE

21

P-4. Zrni� �.N., �or�evi� D.M. (Belgrade – Serbia), Jerman P.B. (Ljubljana – Slovenia), Dragovi� M.B. (Kotor – Montenegro), Gaši� M.V. (Belgrade – Serbia) ENERGY EFFICIENCY AND ENVIRONMENTALY FRIENDLY TECHNOLOGIES IN BULK MATERIALS HANDLING: STATE OF THE ART

31

P-5. Nikezi� S. (Kragujevac – Serbia), Markovi� S. (Podgorica – Montenegro) TRANSFORMATIONAL LEADERSHIP AS A FACTOR PROFOUND CHANGES

49

P-6. Daši� P. (Vrnja�ka Banja – Serbia) ANALYSIS OF THE JOURNAL IMPACT FACTOR IN FIELD OF MECHANICAL ENGINEERING

62

P-7. Maruši� V., Rosandi� Ž (Slavonski Brod – Croatia), Rozing G. (Osijek – Croatia) ALUMINIUM BRONZE AS AN �INSULATOR�

71

P-8. Kegl B., Pehan S. (Maribor – Slovenia) BIODIESEL INFLUENCE ON DIESEL ENGINE EMISSION

80

P-9. Karabegovi� I. (Biha� – Bosnia and Herzegovina), Dole�ek V. (Sarajevo – Bosnia and Herzegovina), Husak E. (Biha� – Bosnia and Herzegovina) APPLICATION OF OPTOELECTRONIC SENSORS IN THE PROCESS INDUSTRY

87

P-10. Meštrovi� R., Dragovi� B. (Kotor – Montenegro) AN ANALYSIS OF SPECIFIC COST RATIO IN A PORT: PART I

93

P-11. Barac N., Milovanovi� G., Radenkovic-Jocic D. (Niš - Serbia) THE USE OF RFID IN RETAIL MANAGEMENT

98

P-12. Jevti� D., Zaki� D., Savi� A. (Belgrade – Serbia) APPLICATION OF RECYCLED MATERIALS FOR PRODUCTION OF SUSTAINABLE CEMENTITIOUS COMPOSITES

110

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SESSION A RESEARCH AND DEVELOPMENT OF MANUFACTURING SYSTEMS, TOOLS AND TECHNOLOGIES, NEW MATERIALS AND PRODUCTION DESIGN

A-1. Avdeenko A.P., Konovalova S.A., Avdeenko E.A. (Kramatorsk – Ukraine) CUTTING COOLANT FOR METAL EDGE CUTTING MACHINING

123

A-2. Barzev I.�., Todorov H.V. (Gabrovo – Bulgaria) PLASMA WELDING OF STATOR SETS FOR ASYNCHRONOUS ELECTRIC MOTOR

127

A-3. Bran I., Li�� M., Locovei C., Rou R.A., Popescu M., Opri C. (Timioara – Romania) EVALUATION OF HYDROXYAPATITE BIOCOMPATIBILITY COATINGS DEPOSITED BY HVOF METHOD

132

A-4. Bria V., Ungureanu V., Roman I., Cîrciumaru A., Bîrsan I.-G. (Gala�i – Romania) A MECHANICAL ANALYSIS OF FABRIC REINFORCED PLIES

138

A-5. amagi� I., Vasi� N., Cvetkovi� S. (Kosovska Mitrovica – Serbia), Burzi� Z., Todi� A. (Belgrade – Serbia) BEHAVIOR ASSESSMENT OF HIGH-STRENGTH LOW-ALLOYED STEEL EXPOSED TO TENSILE AND VARIABLE LOAD

145

A-6. uki� M., Tomi� R., Peci� Lj. (Trstenik – Serbia) THE IMPROVEMENT OF TECHNICAL SOLUTION OF MOBILE COOLING DEVICE REGARDING TO EXCHANGING STIFFNESS SUPPORTS OF PROPULSION SYSTEM

151

A-7. Eri� O., Atanasovska I., Mom�ilovi� D., Doj�inovi� M. (Belgrade – Serbia) ADI MATERIAL FOR GEARS WITH HIGH CONTACT STRESSES

156

A-8. Eri�-Obu�ina J. (Trstenik – Serbia), Obu�ina S.V. (Kraljevo – Serbia) NOISE AND VIBRATIONS IN HYDRAULIC STEERING SYSTEMS ON MOTORS VEHICLES

162

A-9. Gaši� M., Savkovi� M., Markovi� G., Zdravkovi� N. (Kraljevo – Serbia) ANALYSIS OF CARRYING STRUCTURE INFLUENTIAL PARAMETERS ON BOND FUNCTION OF REVOLVING AND NON - REVOLVING PARTS

167

A-10. Gavrish �.A., Tulupov V.I. (Kramatorsk – Ukraine) PERFECTION OF THE THERMAL CYCLE OF COPPER WITH STEEL WELDING

174

A-11. Georgescu C., Deleanu L. (Gala�i – Romania) INFLUENCE OF THE SLIDING DISTANCE FOR PBT-STEEL DRY CONTACT

179

A-12. Hristov G.H. (Gabrovo – Bulgaria), Wassilkowska V.A. (Cracow - Poland) CRYSTALLIZATION BEHAVIOUR OF WIDMANSTÄTTEN FERRITE IN PLANE CARBON STEELS

186

A-13. Kegl B., Pehan S., Kegl M. (Maribor – Slovenia) OPTIMAL DESIGN OF DIESEL FUEL INJECTION SYSTEM BY CONSIDERING FUEL SPRAY CHARACTERISTICS

192

A-14. Kegl T. (Maribor – Slovenia) OPTIMAL DESIGN OF A ROOF USING BIOMIMETICS

203

A-15. Kegl T. (Maribor – Slovenia) STIRLING ENGINE

211

A-16. Kovalevskyy S., Avdeenko A., Kovalevska O., Tulupov V., Starodubcev I. (Kramatorsk – Ukraine) RESEARCH OF TECHNOLOGICAL POSSIBILITIES OF THE COMBINED PRESSING IS ON STRENGTHENING AND QUALITY OF SURFACE OF DETAILS OF MACHINES

219

A-17. Kovalevskyy S., Kovalevska O., Fedyuk T., Starodubcev I. (Kramatorsk – Ukraine)RESEARCH OF TECHNOLOGICAL POSSIBILITIES OF MANAGEMENT OF TECHNOLOGICAL SYSTEM DYNAMIC DESCRIPTIONS

224

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A-18. Kovalevskyy S., Kovalevska O., Kostina A. (Kramatorsk – Ukraine) PERFECTION OF NON-DESTRUCTIVE METHODS OF CONTROL OF SURFACES OF DETAILS OF MACHINES

230

A-19. Kovalevskyy S., Kovalevska O., Pridvorov A. (Kramatorsk – Ukraine) MATHEMATICAL MODEL FOR DETERMINATION OF OPTIMAL MODES OF TREATMENT AT ELECTRO-IMPULSIVE PRESSING

236

A-20. Kumar S., Pradhan D., Kumar Arora P. (Ghaziabad – India), Kumar H. (New Delhi – India) ENVIRONMENTAL EFFECTS ON FATIGUE BEHAVIOR OF MILD STEEL: AN EXPERIMENTAL STUDY

242

A-21. Mihalcea S. (Piteti – Romania) KINEMATIC SIMULATION FOR A MECHANICAL TIMING MECHANISM WITH CONTINUOUS VARIABLE VALVE LIFT

246

A-22. Mihaylov I., Angelov K., Hadzhiyski V. (Plovdiv – Bulgaria) KINEMATIC ANALYSIS OF A SPIRAL FEEDING MECHANISM

256

A-23. Nencheva M.D. (Gabrovo – Bulgaria) EFFECT OF SELF - BLOCKING INVOLUTE CYLINDRICAL GEARS WITH ASYMMETRIC PROFILES AND EXTERNAL ENGAGEMENT

262

A-24. Panteli� P.M. (a�ak – Serbia), Bošnjak M.S., Petkovi� D.Z. (Belgrade – Serbia) EXCAVATION UNITS (RE)DESIGNING FOR MAINTENANCE

265

A-25. Peterka J., Zvon�an M. (Trnava – Slovakia) VOLUMETRIC METHOD OF EDGECHIPPING RATE EVALUATION IN ROTARY ULTRASONIC MACHINING OF SILICA GLASS

272

A-26. Podaru G., Ciortan S., Spanu C. (Galati – Romania) OPTICAL 3D RECONSTRUCTION AS INVESTIGATION METHOD OF WEAR IN PLASTOMER-ELASTOMER COUPLES

279

A-27. Radosavljevi� S. (Lazarevac - Serbia), Daši� P. (Vrnja�ka Banja – Serbia), Radosavljevi� M. (Lazarevac – Serbia) MAINTENANCE PROCESS REENGINEERING THERMAL POWER PLANT

284

A-28. Radosavljevi� S. (Lazarevac - Serbia), Daši� P. (Vrnja�ka Banja – Serbia), Radosavljevi� M. (Lazarevac – Serbia) DEVELOPMENT OF POWER PLANT MAINTENANCE

294

A-29. Roganov L.L., Popivnenko L.V., Rudenko N.A. (Kramatorsk – Ukraine) NEW TECHNOLOGY IMPROVING THE SERVICE CHARACTERISTICS OF SINTERED SELF-LUBRICATION BEARINGS WITH CONTROLLABLE PORE SIZE

303

A-30. Roganov M.L., Roganov L.L, Abramova L.N. (Kramatorsk – Ukraine) GRINDING OF COMPLEX SURFACES OF MECHANICAL ENGINEERING PRODUCTS BY MEANS OF HYDRO MONITORS WITH ABRASIVE INCLUSIONS

309

A-31. Roman I., Bria V., Ungureanu V., Cîrciumaru A., Bîrsan I.-G. (Gala�i – Romania) PHYSICAL PROPERTIES OF STARCH FILLED EPOXY COMPOSITES

312

A-32. Rou R.A., Pascu D.R., Popescu M., Dr�goi S. (Timioara – Romania) REALIZATION OF HETEROGENEOUS JOINTS BY CMT PROCESS

319

A-33. Spasojevi� D., Spasojevi� S. (Belgrade – Serbia), Damjanovic M. (Novi Sad – Serbia) THE SPECIFIC FEATURES OF EQUIPMENT FOR ADI MATERIAL PRODUCTION – ENVIRONMENTAL VIEW

327

A-34. Todorov H. (Gabrovo – Bulgaria) FINISH PROCESSING OF TITANIUM TUBE HOLES BY ROTARY HOLLOW DRAWING

332

A-35. Todorovi� D., Tomi� R., Blagojevic M., Veselinovi� Z. (Trstenik – Serbia) CONDITIONS AND DEVELOPMENT TENDENCIES OF THE GEAR PUMPS

337

A-36. Toncu G. (Bucharest – Romania), Preda I. (Constanta – Romania) ON SOME POSSIBILITIES TO CONTROL FLYING MACHINES

344

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A-37. Ungureanu V., Roman I., Bria V., Cîrciumaru A., Bîrsan I.-G. (Gala�i – Romania) A QUALITATIVE STUDY OF FALIURE MECHANISMS FOR FABRIC REINFORCED LAMINAE

353

A-38. Vasylchenko Y.V., Kovalov V.D. (Kramatorsk – Ukraine) STATISTICAL RESEARCHES OF WORK OF THE ENTERPRISES OF HEAVY MECHANICAL ENGINEERING FOR A SUBSTANTIATION OF TECHNICAL CHARACTERISTICS OF NEW MACHINE TOOLS

359

A-39. Zoller C. (Petrosani – Romania), Daši� P. (Vrnja�ka Banja - Serbia), Costinas S. (Bucharest – Romania), Dobra R. (Petrosani – Romania) PREDICTIVE WIND POWER PLANT CONDITION MONITORING

365

SESSION B TRANSPORT SYSTEMS AND LOGISTICS

B-1. Dimitrijevi� S.B., Nikoli� Lj.M., Vuki�evi� P.I., Simi� D. V. (Belgrade – Serbia) LOCATION MODEL FOR ONE CLASS OF UNDESIRABLE FACILITIES

375

B-2. Dragovi� B., Meštrovi� R. (Kotor – Montenegro) AN ANALYSIS OF SPECIFIC COST RATIO IN A PORT: PART II

382

B-3. Lu�i� P.J., Zrni� D.N. (Belgrade – Serbia) ENERGY EFFICIENCY IMPROVEMENT THROUGH IMPLEMENTATION OF ALTERNATIVE DRIVE SYSTEMS IN FORKLIFT MARKET

386

B-4. Radmilovi� Z., Maraš V., Paškovi� K. (Belgrade – Serbia) BOATING AND CANAL NAVIGATION AS CLIMATE-FRIENDLY TRANSPORT

392

B-5. Škuri� M., Dragovi� B., Markolovi� T., �orovi� B. (Kotor – Montenegro) PORT OF BAR CONCEPTION AND DEVELOPMENT

396

B-6. Škuri� M., Dragovi� B., Meštrovi� R. (Kotor – Montenegro), Zrni� N. (Belgrade – Serbia) AN ESTIMATION OF CONTAINER YARD PERFORMANCE

401

B-7. Urdea G.B., Popescu F.D. (Petroani – Romania) SYSTEMIC ANALYSIS OF TRANSPORT AT VULCAN MINING PLANT

407

B-8. Zrni� N., Rajkovi� M. (Belgrade – Serbia) DOES INTRALOGISTICS SECTOR CARE ABOUT ENVIRONMENT: SUSTAINABILITY AND ENERGY EFFICIENCY IN WAREHOUSING

414

SESSION C APPLICATION OF INFORMATION TECHNOLOGIES IN MECHANICAL ENGINEERING

C-1. Aleksandrov S., ajetinac S. (Trstenik – Serbia), Zoran Jovanovi� Z. (Niš – Serbia) INTERNET ACCESS TO PLC WITH INTEGRATED WEB SERVER

425

C-2. Alipiev D. (Sofia – Bulgaria) AN EDUCATIONAL COMPUTER PROGRAM FOR DETERMINATION OF HYDROGEN CONTENT IN MOLTEN AL-SI ALLOYS

431

C-3. Atanasovska I., Mom�ilovi� D., Eri� O. (Belgrade – Serbia) RATE INDEPENDENT PLASTICITY - A MATERIAL NONLINEARITY IN FINITE ELEMENT ANALYSIS

435

C-4. Bošnjak M.S., Petkovi� D.Z., Mihajlovi� M.V., Milojevi� Z.G., Milenovi� Lj.I. (Belgrade – Serbia) CAD OF THE SPECIAL CAR LIFTING DEVICE

444

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C-5. Bošnjak M.S., Petkovi� D.Z., Simonovi� M.A., Milovan�evi� �.M., Milenovi� Lj.I. (Belgrade – Serbia) STRUCTURAL AND CONTACT STRENGTH OF THE REVOLVING DRYER

450

C-6. Ciortan S., Podaru G., Birsan I.G. (Galati – Romania) NEURAL NETWORK BASED ANALYSIS OF FRICTION COEFFICIENT EVOLUTION IN STUFFING BOX SEALS

456

C-7. ajetinac S., Todorovi� M., Aleksandrov S. (Trstenik – Serbia), Novakovi� M. (Belgrade – Serbia) MODELLING AND SIMULATION OF PNEUMATIC ACTUATOR

460

C-8. Damnjanovi� Z., Štrbac N., Pantovi� R. (Bor – Serbia), Stojkovi� Z. (Zaje�ar – Serbia) NUMERICAL METHODS IN TERMAL TESTING OF BUILDING MATERIALS USING IR THERMOGRAPHY

465

C-9. Damnjanovi� Z., Štrbac N. (Bor – Serbia), Velimirovi� N. (Niš – Serbia), Mladenovi�-Ranisavljevi� I. (Leskovac – Serbia) AN ALGORITHMS FOR IR THERMOGRAMS FOR DIAGNOSTICS A OBJECTS

472

C-10. Deni� B.D., Miljkovi� S.G., Luki� R.J., Simi� M.M. (Niš - Serbia) SERIAL CODE READING CORRECTNESS DETECTION APPLIED TO PSEUDORANDOM ABSOLUTE ENCODERS

481

C-11. Eri� M.D. (a�ak - Serbia), Mandi� V. (Kragujevac - Serbia), Markovi� S. (a�ak - Serbia) INTEGRATED SYSTEMS IN THE DEVELOPMENT OF CONCEPT OF CONCURRENT ENGINEERING

489

C-12. Eri�-Obu�ina J., Todorovi� M., ajetinac S., Jevremovi� V. (Trstenik – Serbia) KINEMATIC ANALYSIS AND ANIMATION OF MOTION OF THE MECHANISM CONSISTING OF ROD AND SLIDER

494

C-13. Gorbach E.V., Sereda V.G., Palamarchuk V.A. (Kramatorsk – Ukraine) RESEARCH AND PERFECTION OF TECHNOLOGICAL PROCESS OF TANGENTIAL ROLLING OF PIPES BY FRICTION TOOL

499

C-14. Gospodinov D., Hadjiiski V., Stefanov S. (Plovdiv – Bulgaria) USING OF THE FINITE ELEMENT METHOD FOR STUDYING THE EFFECT OF THE BASIC GEOMETRIC PARAMETERS OF THE CORRUGATED PAPERBOARD OVER ITS COMPLEX MECHANICAL PROPERTIES

507

C-15. Hladnik J., Resman F., Jerman B. (Ljubljana – Slovenia) FINITE ELEMENTANALYSIS OF CROSS-COUNTRY SKIING BOOT TORSION STIFFNESS

513

C-16. Kazimierska-Grebosz M. (Lodz – Poland) THE RESEARCH OF ACOUSTIC SCREENS IN ANECHOIC ROOM AND IN REAL CONDITIONS

520

C-17. Kegl M., Harl B. (Maribor – Slovenia) TOPOLOGY OPTIMIZATION USING DESIGN ELEMENTS AND A LEVEL SET FUNCTION

526

C-18. Litovchenko I., Shpak M. (Kyiv – Ukraine), Stefanov S., Hadjiiski W. (Plovdiv – Bulgaria) MIXER`S DESIGN METHOD WITH COMPUTER MODELING

533

C-19. Mikhov M.R. (Sofia – Bulgaria) PERFORMANCE ANALYSIS OF A BRUSHLESS DC MOTOR DRIVE FOR MECHANICAL INDUSTRY

539

C-20. Mili�evi� I., Boškovi� N., Slavkovi� R., Golubovi� D., Du�i� N. (Cacak – Serbia) DESIGN AND SIMULATION OF AUTOMATION CONTROL SYSTEM FOR MECHATRONIC SYSTEM PROTOTYPE FOR PRODUCTION OF WIRED PROFILES WEDGE SHAPED

545

C-21. Morovi� L., Peterka J., Ková� M. (Trnava – Slovakia) DIGITIZATION OF BALL NOSE END MILLS BY OPTICAL 3D SCANNER

550

XIV

C-22. Nikoli� Z. (Trstenik - Serbia), Bujoševi� V. (Belgrade - Serbia), Daši� P. (Vrnja�ka Banja – Serbia) INFORMATION MODELLING OF PRODUCTION – INVESTMENT BUILDING USING IDEF METHOD

556

C-23. Nikoli� Z. (Trstenik - Serbia), Radovanovi� M. (Belgrade - Serbia) FUNCTIONAL MODELLING OF LIBRARY INFORMATION SYSTEM USING IDEF METHODS

561

C-24. Novakovi� M. (Belgrade - Serbia), ajetinac S., Mijatovi� M. (Trstenik - Serbia) EXPERIMENTAL TESTING RESULTS AND DISCRETE DYNAMIC MODEL DETERMINATION OF ONE ELECTRONICALLY CONTROLED HYDROSTATIC TRANSMISSION

572

C-25. Radovanovi� M. (Belgrade - Serbia), Nikoli� Z. (Trstenik - Serbia) INFORMATION MODELLING OF LIBRARY INFORMATION SYSTEM BY IDEF METHOD

576

C-26. Vreki� S. (Kragujevac – Serbia) INTEGRATION OF 3D CAD DESIGN STRUCTURE OF VEHICLE PARTS TO INCREASED PASSIVE SAFETY VEHICLE

584

C-27. Yordanov S.Y., Ivanova N.I. (Gabrovo – Bulgaria) OBJECTIVE-ORIENTATED LIBRARY FOR CODING OF THE TRANSMITTED INFORMATION IN PUBLIC NETWORKS

589

C-28. Zhelezarova I.D., Rashev E.G. (Gabrovo – Bulgaria) FREQUENCY ANALYSIS OF INPUT SHAFT FROM THE REDUCER ABOUT ROPE ELECTRIC HOIST

595

C-29. Živkovi� T. (Vrnja�ka Banja – Serbia), Cvetkovi� Z., Jovanovi� A. (Niš - Serbia) LEGAL PROTECTION OF COMPUTER DATA SAFETY

600

Volume 2

SESSION D QUALITY MANAGEMENT, ISO 9000, ISO 14000, TQM AND MANAGEMENT IN MECHANICAL ENGINEERING

D-1. Andros V.S. (Kiev – Ukraine) IMPACT OF GLOBALIZATION ON THE WORLD FINANCIAL MARKETS

605

D-2. Andjelkovi� Peši� M., Peši� M. (Niš – Serbia) THE SIX SIGMA WAY FOR PROCESS STRUCTURING

611

D-3. Avramovi� M., Popovi� S. (Leskovac – Serbia) QUALITY MANAGEMENT IN EMPLOYEES RECREATION

616

D-4. Bejtovi� S. (Novi Pazar – Serbia), Imamovi� M., Bektaševi� S. (Travnik – Bosnia and Herzegovina) HUMAN ECOLOGY IN THE QUALITY OF LIFE

621

D-5. Bio�anin I. (Kruševac – Serbia), Cveji� R. (Požarevac – Serbia) ENERGY EFFICIENCY AND ENVIRONMENTAL PROTECTION

626

D-6. Bio�anin R. (Novi Pazar – Serbia), Kalini� Z. (Banja Luka – Bosnia and Herzegovina), Radovi� S. (Belgrade – Serbia) MANAGEMENT OF NEW TECHNOLOGIES WITH ECONOMIC AND ECOLOGICAL ASPECTS OF PRODUCTION

634

XV

D-7. Boji� B., Huseinovi� A. (Sarajevo – Bosnia and Herzegovina) VIEW OF FOREIGN TRADE OF BOSNIA AND HERZEGOVINA IN PERIOD 2003-2010

639

D-8. Bojovi� P., �urin S. (Zrenjanin – Serbia) SELECTED TURNOVER COEFFICIENTS, RATIOS AND OTHER INDICATORS IN ROLE OF COMPANY FINANCIAL ANALYSIS IN PRODUCTION, INDUSTRIAL, SERVICE AND OTHER ACTIVITIES

647

D-9. Bojovi� P. (Zrenjanin – Serbia), Živkovi� A. (Belgrade – Serbia) SELECTED RATIO NUMBERS IN THE FUNCTION OF ANALYZING A COMPANY OF MANUFACTURING, INDUSTRIAL, SERVICE AND OTHER ACTIVITY

653

D-10. Boškovi� S.G., Jankovi�-Mili� P.V., An�elkovi�-Peši� M.M. (Niš – Serbia) POSSIBILITIES OF CUSUM CHART IMPLEMENTATION IN STATISTICAL PROCESS CONTROL

663

D-11. Brankovi� N. (Sombor – Serbia) CONTRIBUTION OF WEB SITE TO SCHOOL ETOS

668

D-12. Chumicheva R. (Rostov - Russia), Shevchenko G. (Lugansk – Ukraine), Kovalevskyy S., Kosheva L. (Kramatorsk – Ukraine) MANAGEMENT PERSONNEL AND NEW PEDAGOGICAL TECHNOLOGIES FOR ECONOMIC PRODUCTION SYSTEMS

675

D-13. �osi� Lj. (Sarajevo – Bosnia and Herzegovina), Radovanovi� D., Cabo Z. (Isto�no Sarajevo – Bosnia and Herzegovina), Sladoje M. (Sarajevo – Bosnia and Herzegovina) MANAGEMENT ACTIVITIES THROUGH THE INFLUENCE OF DIGITAL MARKETING IN RECESSION

680

D-14. Dini� M., Peci� Lj., Jevti� N. (Trstenik – Serbia) REPORT OF 8D

684

D-15. �uri� M., �uri� S. (Kostolac – Serbia) SIGNIFICANCE OF INTRODUCING BASEL II STANDARD AND ITS MACROECONOMIC IMPACT ON SERBIA

692

D-16. Elezovi� N. (Kosovska Mitrovica – Serbia), Šerifi S.V. (Vrnja�ka Banja – Serbia), Cveji� R. (Požarevac – Serbia) ANALYSIS OF WATER AND AIR QUALITY IN MITROVICA DISTRICT

698

D-17. Fedorinov V., Fesenko A., Kovalevskyy S. (Kramatorsk – Ukraine) STAFFING TECHNOLOGY TRANSFER AS A BASIS FOR THE PRODUCTION OF INNOVATION

706

D-18. Gerasymchuk H.V. (Kiev – Ukraine) INDUSTRY DETERMINES ECONOMIC POTENTIAL OF THE STATE IN THE CONDITIONS OF CIVILIZATION TRANSFORMATIONS

709

D-19. Gherghel S., Secan C. (Oradea – Romania) ANALYSIS OF QUALITY – RISK CORELLATION IN ECONOMIC – INDUSTRIAL PROCESSES

719

D-20. Grubi� G. (Belgrade – Serbia), Ratkovi� M. (Sremski Karlovci - Serbia), Janjuši� D. (Belgrade – Serbia) BUSINESS IMPROVEMENT OF INDUSTRIAL PRODUCERS IN SERBIA USING WEB TECHOLOGIES

723

D-21. Hamidovi� Dž., Papi� H., Tahirbegovi� S. (Novi Pazar – Serbia), Bio�anin J. (Kruševac – Serbia) ENVIRONMENTAL STANDARDS IN THE RESEARCH - DEVELOPMENT PROJECTS AND SUSTAINABLE DEVELOPMENT

731

D-22. Ignjatovic S. (Pozarevac – Serbia) ROLE OF BASEL COMMITTEE IN INTERNATIONAL HARMONIZATION OF PRUDENTIAL REGULATION OF BANKS BUSINESS

741

XVI

D-23. Karadži� R. (Berane – Montenegro), Bulatovi� M. (Podgorica – Montenegro), Petkovi� D. (Zenica – Bosnia and Herzegovina), Šabi� M. (Sarajevo – Bosnia and Herzegovina), Mirosavljevi� P. (Belgrade – Serbia) MODEL OF AIRCRAFT CONDITION BASED MAINTENANCE CONSIDERING CAPABILITIES OF SMALL COUNTRIES

748

D-24. Kari� D., Ze�evi� R., Labovi� D. (Belgrade – Serbia) ROLE AND IMPORTANCE OF INVESTMENT FUNDS IN MODERN MARKET CONDITIONS

755

D-25. Kostadinovi� S.D. (Belgrade – Serbia), Miljkovi� V.M., Ilievska M. (Niš – Serbia) ELEMENTS AND OBJECTIVES OF LIFELONG EDUCATION CONCEPT

764

D-26. Kostadinovi� A.G., Dimitrijevi� M. (Niš – Serbia), Joviši� M. (Belgrade – Serbia) BASIC FUNCTIONS OF LOGISTICS INFORMATION SYSTEMS

769

D-27. Malenovi�-Nikoli� R.J., Jana�kovi� Lj. G. (Niš – Serbia), Ristovi� M.I. (Belgrade – Serbia) GAUSSIAN MODEL FOR DETERMINING IMMISSION CONCENTRATIONS OF SULPHUR DIOXIDE AND SELECTION OF MEASURING LOCATIONS FOR THERMAL POWER PLANT MONITORING SYSTEM

775

D-28. Mandi�-Dragi� M. (Gradiška – Bosnia and Herzegovina) EDUCATION OF MANAGERS IN BOSNIA AND HERZEGOVINA

781

D-29. Markovi� N. (Novi Sad – Serbia), Stevi� S. (Banja Luka – Bosnia and Herzegovina), Cuze I. (Zagreb – Croatia) IMPROVEMENTS AND INOVATIONS OF BUSINESS PROCESSES REENGINEERING

785

D-30. Memet A. (Krusevac – Serbia), Milosavljevic M. (Kosovska Mitrovica – Serbia) PROFITABILITY OF BUSINESS IN SERBIA

790

D-31. Milentijevi� G., Nedeljkovi� B. (Kosovska Mitrovica – Serbia) MONITORING AND ANALYSIS OF HEAVY METALS IN RIVER IBAR IN THE AREA OF LEPOSAVIC

806

D-32. Milic V., Ceperkovic J. (Vrnja�ka Banja – Serbia) INVESTMENT IN INNOVATION THROUGH APPLICATION OF MARKETING MIX

816

D-33. Milic V., Ceperkovic J. (Vrnja�ka Banja – Serbia) RESEARCH AND DEVELOPMENT OF INNOVATIONS IN MECHANICAL INDUSTRY FROM ASPECT OF MARKETING

821

D-34. Milosavljevi� B., Panti� R. (Trstenik – Serbia), Luki� J. (Kragujevac – Serbia)), Babi� S. (Trstenik – Serbia) AERODYNAMICS OF MOTOR VEHICLE AND EFFECTS ON FUEL ECONOMY

825

D-35. Momcilovic O., Rajakovic J., Mijailovi� J. (Novi Sad – Serbia) TYPES AND CHARACTERISTICS OF CHANGES

834

D-36. Momcilovic O., Rajakovic J., Rajakovi� V. (Novi Sad – Serbia) MANAGING ORGANIZATIONAL CULTURE

839

D-37. Mrgud V. (Banja Luka – Bosnia and Herzegovina), Popovi� H. (Sarajevo – Bosnia and Herzegovina), Mrgud R. (Foca – Bosnia and Herzegovina), Bukvi� N., Todorovi� B. (Sarajevo – Bosnia and Herzegovina) MEDICAL WASTE MANAGEMENT ETHICAL AND LEGAL OBLIGATIONS

845

D-38. Nikoli� R., Urosevi� S., Fedajev A., Rizni� D., Svrkota I. (Bor – Serbia) METAL INDUSTRY OF TIMOK REGION IN TRANSITION PERIOD

851

D-39. Peci� Lj., Luki� S., Markovi� D. (Trstenik – Serbia) FMEA ANALYSIS - TAKEN SERIOUSLY IS THE SERIOUS ADVANTAGE ON THE MARKET

855

D-40. Peci� Lj., Tomi� R., �uki� M. (Trstenik – Serbia) TEAMWORK AS A PREREQUISITE FOR OPTIMAL RESPONSE TO MULTI-CRITERIA REQUIREMENTS OF THE GKOBAL MARKET

864

XVII

D-41. Peci� Lj., Tomi� R., Dini� M. (Trstenik – Serbia) INTEGRAL QUALITY SYSTEM INTRODUCTION – PROJECT MANAGEMENT: ATTACHMENT TO MODEL RESEARCH FOR THE CHOICE OF INFORMATIONAL SYSTEM ACCORDING TO COMPANY PROFILE

869

D-42. Petrovi� P., Vesi� D. (Belgrade – Serbia) THE STRATEGIC MANAGEMENT PATTERN CHANGES IN THE MECHANICAL INDUSTRY

875

D-43. Risti� O. (a�ak – Serbia), Mari� A. (Kruševac – Serbia) SIMULATION MODEL OF RELIABILITY AND MAINTENANCE COST ANALYSIS

879

D-44. Rizni� T.D. (Bor – Serbia), Raji� T., Nikoli� I. (Aran�elovac – Serbia) ECONOMIC REQUIREMENTS AND EDUCATIONAL PROCESS IN SERBIA

886

D-45. Rizni� T.D. (Bor – Serbia), Vojnovi� B. (Šabac – Serbia) CONCEPT OF MARKETING QUALITY AND BRANDING IN THE FUNCTION OF EFFICIENCY IN INDUSTRIAL MARKETING

894

D-46. Sakalosh V.T. (Kyiv – Ukraine) COMPETITIVENESS FACTOR FOR INTERNATIONAL PRODUCTION COOPERATION OF HOIST AND TRAVELLING EQUIPMENT MANUFACTURERS

902

D-47. Skorobogatova N. (Kiev – Ukraine) INVESTMENT POTENTIAL OF INDUSTRIAL ENTERPRISE IN THEORY OF SUSTAINABLE DEVELOPMENT

911

D-48. Sofiu V. (Tetovo – Macedonia), Šerifi S.V. (Vrnja�ka Banja – Serbia) AN OVERVIEW OF DIRECT SOLAR IRRADIATION

919

D-49. Spai� J. (Trebinje – Bosnia and Herzegovina), Pušara N., Živkovi� S. (Belgrade – Serbia) AN OVERVIEW OF THE BUSINESS OF NON-GOVERNMENTAL ORGANIZATION

925

D-50. Stankovic B. (Novi Pazar – Serbia) LEGISLATIVE FRAMEWORK FOR RESTRUCTURING OF PUBLIC ENTERPRISES IN SERBIA, FOR INSTANCE THE RAILWAY SECTOR

933

D-51. Stefanov S. (Novi Sad – Serbia), Bio�anin R. (Novi Pazar – Serbia), Pavlovic S. (Banja Luka – Bosnia and Herzegovina) MODELING OF POLLUTANTS CO, PM, PAH IN ACCIDENTAL FIRE AT THE LANDFILL WASTE

938

D-52. Stojanovi� M., Barzilovi� S., Tomi� M. (Bor – Serbia) ROLE OF HUMAN RESOURCES MANAGEMENT IN ORDER TO REDUCE THE FLUCTUATION OF EMPLOYEES IN THE MECHANICAL INDUSTRY

947

D-53. Šerifi S.V. (Vrnja�ka Banja – Serbia), Elezovi� N. (Kosovska Mitrovica – Serbia), �ur�i� S. (a�ak – Serbia) A CONCEPT OF POSSIBLE MODEL SOLUTIONS OF WASTE MANAGEMENT SYSTEM IN THE PRIZREN REGION

955

D-54. Škrbi� V. (Banja Luka – Bosnia and Herzegovina), Badi� M., Bio�anin R. (Novi Pazar – Serbia) SECURITY INTELLIGENCE ACTIVITIES IN THE TRANSPORTATION MANAGEMENT DANGEROUS

962

D-55. Todorovi� O., Stankovi� J., Stankovi� J. (Niš – Serbia) MULTI-CRITERIA ANALYSIS MODELS IN THE FUNCTION OF MANAGING OPERATIONAL RISK IN THE ENTERPRISE

969

D-56. Tomi� R., Peci� Lj. (Trstenik – Serbia), Mandi� V. (Kragujevac – Serbia) CONTRIBUTION TO MANAGEMENT OF RESEARCH OF SYSTEM OF HARD INDUSTRIAL WASTE TREATMENT

974

XVIII

D-57. Tomic R. (Trstenik – Serbia), Sedmak A. (Belgrade – Serbia), Pecic Lj. (Trstenik – Serbia) PROCESS OF GENERATING OF QUALITY SOLUTION OF THE OIL GEAR PUMP WHICH IS LEADING TO EFFECTIVELY HIGH PERFORMANCE PRODUCT

981

D-58. Trnavac D. (Belgrade – Serbia), Daši� P. (Vrnja�ka Banja – Serbia), Stanisavljevi� I. (Leskovac – Serbia) STATISTICAL INDICATORS OF INNOVATION IN REPUBLIC OF SERBIA

992

D-59. Veloji� D., Tomi� M. (Bor – Serbia) THE MOTIVATION OF EMPLOYEES IN INDUSTRY

998

D-60. Veselinovi� P., Mi�i� V. (Kragujevac – Serbia), Mileti� D. (Zaje�ar – Serbia) TECHNOLOGICAL INTENSITY, COMPETITIVENESS AND INNOVATIVITY OF MANUFACTURING INDUSTRY OF SERBIA

1004

D-61. Vidovi� A. (Banja Luka – Bosnia and Herzegovina) RISK MANAGEMENT IN ISO 9000, ISO 14000 AND ISO 14001

1012

D-62. Ze�evi� R., Kari� D., Labovi� D. (Belgrade – Serbia) FOREIGN DIRECT INVESTMENT AS A FACTOR OF THE INDUSTRIAL DEVELOPMENT

1016

D-63. Zhelezarova I.S. (Gabrovo – Bulgaria) CLASSIFICATION OF THE STATISTICAL METHODS FOR QUALITY MANAGEMENT

1021

D-64. Zurni� S. (Gradiška – Bosnia and Herzegovina) RESEARCH AND DEVELOPMENT FOR SMALL AND MEDIUM-SIZED COMPANIES IN BOSNIA AND HERZEGOVINA

1025

D-65. Živadinovi� J. (Bor – Serbia) EDUCATION AND DEVELOPMENT OF EMPLOYEES IN THE MECHANICAL INDUSTRY

1030

SESSION E APPLICATION OF MECHANICAL ENGINEERING IN OTHER INDUSTRIAL FIELDS

E-1. Arsenijevi� D., Jankovi� V., Paji� T. (Lazarevac – Serbia) RECONSTRUCTION OF BUCKET WHEEL EXCAVATIOR SchRs -1760 SLEWING DRIVE AND PROVIDING PROTECTION FROM ACCIDENTAL BREAKDOWN

1039

E-2. Avdeenko A.P., Konovalova S.A., Avdeenko E.A. (Kramatorsk – Ukraine) TESTS OF MEDIUM-TEMPERATURE GREASE “NATOL-P-1” ON ROLLER-FRICTION TEST MACHINE

1046

E-3. Bajmak Š. (Kosovska Mitrovica – Serbia) ANALYSIS OF CHARACTERISTICS CAVITATION EJECTORS IN CENTRAL HETING SYSTEMS WITH TEMPERATURE AND INJECTED OF FLUID

1050

E-4. Bajmak Š. (Kosovska Mitrovica – Serbia) ANALYSIS OF THE REGIME OF SUBSTATIONS WITH DIRECT WATER AFTER SEIZURE EJECTORS DEPENDING ON THE HEAT CAPACITY OF HEAT

1060

E-5. Bajmak Š. (Kosovska Mitrovica – Serbia) DETRENINATION OF EITHER PER - HOUR AND PER YEAR OPTIMAL COOLING COEFICIENT AS WELL AS RATEID AND PEAK - LOAD COOLING ENERGY SOURCE (COOLD WATHER) RATIO IN THE SYSTEM OF CENTRALIZED SUPPLAY WITH COOLING ENERGY (SCSCE)

1068

E-6. Bajmak Š. (Kosovska Mitrovica – Serbia), Šerifi S.V. (Vrnja�ka Banja – Serbia) ANALYSIS AND CALCULATION OF GAS - TURBINE PLANTS WITH WARM AIR, MULTISTAGE COMPRESSION AND EXPANSION OF MULTISTAGE

1079

XIX

E-7. Bajmak Š. (Kosovska Mitrovica – Serbia), Šerifi S.V. (Vrnja�ka Banja – Serbia) ANALYSIS OF DISTRICT COOLING AND DETERMINATION OF OPTIMAL DEPTH OF LAYING PIPELINES WITH COLD WATER IN THE DISTRICT COOLING

1087

E-8. Bugariu D., Pasca O.M., Toth-Tascau M., Saftescu-Jescu C. (Timisoara – Romania)STUDY OF FLEXIOX-EXTENSION MOVEMENT IN KNEE AND ANKLE JOINTS DURING CYCLING

1097

E-9. Chudzik A. ( ód� – Poland) PERFORATED WALLS – PERFORATED PLATES INTEGRAL PART OF THE HEAT EXCHANGER

1103

E-10. �oki� D.J., Vukovi� D.G., Sovrli� R.V., Popovi� M.Z., Marinkovi� D.A., Uskokovi� S.P. (Belgrade – Serbia) FUNCTIONALIZATION OF MULTI-WALLED CARBON NANOTUBES BY BINGEL REACTION AND 1,3-DIPOLAR CYCLOADITION

1109

E-11. �or�evi� Lj., Trifunovi� D., Mihajlovi� G., Nikoli� R. (Trstenik – Serbia) THE PROBLEM OF MAINTAINING COPPER ORE GRINDING MACHINES

1118

E-12. �ukanovi� S.J., Marinkovi� D.A. (Belgrade – Serbia), Milosavljevi� M.M. (Kosovska Mitrovica – Serbia), Markovi� M.J., Boži� R.A., Budimirovi� S.D. (Belgrade – Serbia) CATALYTIC SYNTHESIS OF N-ALKYL, N, N-DIALKYL AND N-CYCLOALKYL-O-ISOBUTYLTHIONCARBAMATES APPLIED AT SEMI-INDUSTRIAL LEVEL

1123

E-13. Kochevski V.P., Kochevska V.V., Dochev M.G. , Penkova T.G. (Lovech – Bulgaria) CORDLESS HAND DRILLS

1129

E-14. Korchak E.S. (Kramatorsk – Ukraine) SYSTEM OF ACCELERATED FILLING OF HYDRAULIC PRESS POWER CYLINDERS WITH LOW-PRESSURE HYDRAULIC FLUID

1133

E-15. Korchak E.S., Bykovsky V.N. (Kramatorsk – Ukraine) HOW TO PROJECT RELIABLE AND DURABLE HYDRAULIC PRESS FRAMES OF COLUMNAR TYPE

1137

E-16. Kudina H.F. (Gomel – Belarus), Burya A.I. (Dnipropetrovsk – Ukraine) THE INFLUENCE OF HYBRIDE FILLERS ON SILICATE MATRIX ON PHYSICO-MECHANICAL PROPERTIES OF COMPOSITES

1142

E-17. Markovi� D., Velji� M., Simonovi� V., Markovi� I. (Belgrade – Serbia) VELOCITY SENSORS OF ROTATION TECHNOLOGICALS UNITS ON GRAIN COMBINES AND DIRECTIVES FOR THEIRS CALIBRATION

1149

E-18. Markovi� M.J., Brkovi� V.D., �ukanovi� S.J., Ka�arevi�-Cvetkovi� J., Budimirovi� S.D., Marinkovi� D.A. (Belgrade – Serbia) GLYCOLYSIS OF POLYETHYLENE TEREPHTHALATE WASTE

1156

E-19. Medgyesi T., Popescu M., Opris C., Bereteu L., Rosu R., Micu L. (Timisoara – Romania) MAKING OF FLAME BRAZED JOINTS FROM THE REFRIGERATION MECHANISM OF REFRIGERATORS USED FOR FOOD INDUSTRY

1162

E-20. Mihajlovi� G., �or�evi� Lj., Nikoli� R., Trifunovi� D. (Trstenik – Serbia) HYDRAULIC AND PHEUMATIC COMPONENT REENGINEERING BY HARD CHROME PLATING

1168

E-21. Mikhov M.R. (Sofia – Bulgaria) PERFORMANCE ANALYSIS OF A BRUSHLESS DC MOTOR DRIVE FOR MECHANICAL INDUSTRY

1172

E-22. Milosavljevi� M.M. (Kosovska Mitrovica – Serbia), Marinkovi� D.A., �ukanovi� S.J., Brkovi� V.D., Ka�arevi�-Cvetkovi� J., Živanovi� Z.M. (Belgrade – Serbia) SYNTHESIS OF N-ALKYL, N, N-DIALKYL AND N-CYCLOALKYL-O-ISOBUTYL THIONCARBAMATES: A CATALYTIC STUDY

1178

E-23. Nagy R., Menyhardt K. (Timisoara – Romania) KINEMATICS OF AN UPPER LIMB PROSTHESIS MODEL

1184

XX

E-24. Ormandzhiev H.K. (Gabrovo – Bulgaria) DYNAMICAL PROCESSES IN AUTOMATIC SYSTEM FOR GOVERNING OF CROSS-FLOW TURBINE

1191

E-25. Pasca O.M., Vigaru C., Stoia D.I. (Timisoara – Romania) SHORT REVIEW ON ANKLE-FOOT ORTHOTICS

1199

E-26. Popescu M., Rou R.A., Bran I. (Timisoara – Romania) RESPIRATORY PROTECTION AT THERMAL SPRAYING

1204

E-27. Pulov D. (Gabrovo – Bulgaria) INFRARED TRIPLET – THE THIRD ORDER SOLUTIONS

1210

E-28. Rachev P. (Gabrovo – Bulgaria) MATHEMATICAL MODELING OF ERRORS OBTAINING PROCESS DURING MECHANICAL TREATMENT

1217

E-29. Rachev S., Dimitrov Ly. (Gabrovo – Bulgaria) DETERMINATION OF ELECTRICAL ENERGY LOSSES IN CASE OF CENTRIFUGAL PUMP STARTING

1223

E-30. Rancea A. (Iai – Romania), M�cu�� S. (Gala�i – Romania) THE METHOD TO REUSE A MATERIAL USED IN ORTHOTIC

1231

E-31. Rancea A. (Iai – Romania), M�cu�� S. (Gala�i – Romania), Merticaru V. (Iai – Romania) ”COMARNA” ORTHOSIS FOR TRAUMA RECOVERY ON THE AHILES TENDON

1235

E-32. Rudenko N.A., Laptev A.M. (Kramatorsk – Ukraine) COMPACTION AND PROPERTIES OF HIGHLY POROUS POWDER PARTS PRODUCED WITH VARIOUS PORE FORMERS

1240

E-33. Simi� D.V., Dimitrijevi� S.B. (Belgrade – Serbia) MODELLING OF AUTOMOBILE SHREDDER RESIDUE PROCESSING

1245

E-34. Slavov D.Z. (Varna – Bulgaria) ON THE DECISION THEORY WITH INFINITE MANY CRITERIA IN ENGINEERING SYSTEM

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E-35. Subaranovic T., Polomcic D., Pavlovic V., Pajic N. (Belgrade – Serbia) A TRANSIENT THREE-DIMENSIONAL NUMERICAL MODEL OF WATER IMPERMEABLE SCREEN EFFECTS ON THE GROUNDWATER INFLOW REDUCTION INTO THE MINE (CASE STUDY: OPEN PIT MINE DRMNO, SERBIA)

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A TRANSIENT THREE-DIMENSIONAL NUMERICAL MODEL OF WATER IMPERMEABLE SCREEN EFFECTS ON THE

GROUNDWATER INFLOW REDUCTION INTO THE MINE (CASE STUDY: OPEN PIT MINE DRMNO, SERBIA)

Tomislav Subaranovic1, Dusan Polomcic2, Vladimir Pavlovic3, Natasa Pajic4

University of Belgrade, Faculty of Mining and Geology, 11000 Belgrade, SERBIA 1 E-mail: tomace@rgf.bg.ac.rs, 2 E-mail: dupol2@gmail.com,

3 E-mail: vladimir.pavlovic@rgf.bg.ac.rs, 4 Military Technical Institute, 11000 Belgrade, SERBIA, E-mail: natasa.pajic@eunet.rs

Summary: In this paper are presented effects of water impermeable screen in dewatering system of the open pit mine. The Drmno open pit mine is the second largest active mine in Serbia where coal has been exploited for more than twenty years. The nearness of Danube and Mlava river being in intensive hydraulic connection with aquifers surrounding the mine have conditioned both the complexity of hydrogeological terrain and the mine protection system from groundwater. So far in the design solutions of the Drmno open pit mine pre-dewatering, the protection system from groundwater in front of the mine advancing contour has consisted exclusively of drainage wells. However, such a mine protection system has not yielded satisfactory results, thus significantly higher groundwater table than required for undisturbed work has been recorded. Therefore, the possibility of constructing water impermeable screen in front of face advancing has been considered whereby the water inflow from the rivers would be prevented. The selection of screen location has been determined on the basis of extensive exploratory work. The presented hydrodynamic analysis is the first quantified indicator of a water impermeable screen influence on the groundwater inflow reduction into the mine. Key words: groundwater modeling, open pit mine, dewatering system, water impermeable screen. 1. INTRODUCTION The Drmno open pit mine is situated 100 km east of Belgrade, in the vicinity of the confluence of the Mlava River into the Danube. These rivers, as well as Dunavac channel, being intensive hydraulic connections with aquifers formed in alluvial sediments, Romanian gravel and Pontian sand which overlying two main coil soils. In this circumstances design of mine protection system from groundwater is very complex. In the past twenty years several numerical model was created to improve designing of the dewatering system. The previous multi-layer model of the Drmno open pit mine was completed in 1999 [1 Pusic et al., 1999]. In the meantime, significant changes of the size and shape of the open pit mine flow field have occurred, thus in order to conduct this hydrodynamic analysis of screen completing effect at the Drmno open pit mine, its new numerical model was required.

11th International Conference �Research and Development in Mechanical Industry�

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2. MATERIAL AND METHODOLOGY The geology conditions around the Drmno open pit is very comlexity. The result of sedimentation conditions is periodic appearance sedimentary series, which consist alluvial deposits and loess, Romanian gravel (Pl1), the second coal soil, Pontian sand (2Pl3

2), dusty sand and the third coal soil (from top to bottom) (figure 1). Identified layers from the surface of the terrain are given in table 1. The overlying bed of the Fifth or the Sixth layer (unevenly) is comprised of the Third coal layer, which is, by its hydrogeological and hydraulic mechanism an aquifuge. As an illustration of the stated schematization, in Figure 1, there are shown schematized lithological profiles of the Drmno open pit striking south-north and west-east. The drainage wells are located in the from of line barrages along the boundaries of the open pit mine and in front of the face line in ten barrages (figure 2). The distance between well barrages is from 450-650 m. Each well barrage consists of two well lines (one for tapping aquifer in Romanian gravel, one for aquifer in Pontian sand) being at the distance of 50 m, except the SLA barrage being with one well line (tapping only aquifer in gravel). Wells in line are from 75 to 150 m far away one from another. All the wells are worked as fully penetrated, with the depth of 26.5 - 143 m.

Table 1: Identified layers of the Drmno open pit

First water-bearing layer Overlying alluvial and loess sediments Second water-bearing layer Predominantly gravel water-bearing layer

Third water-bearing layer Sandy and clayey layer in the overlying bed of the Second coal soil which drifts into the overlying sandy layer of the Third coal soil;

Fourth combined aquifuge - The Second coal layer (aquifuge) drifting into water bearing layer overlying sandy layer of the Third coal layer;

Fifth water-bearing layer Sandy layer overlying the Third coal layer. In western part of the terrain it overlies the Sixth (model) water-bearing layer;

Sixth combined aquifuge – water-bearing layer

The silt-sandy layer overlying the Third coal layer. In part of the terrain where it is absent, sands, whose main representative in the model is the Fifth water-bearing layer, constitute the overlying bed of the Third coal layer.

Figure 1: Schematic cross-section of the Open Pit Drmno [2 Pusic and Polomcic, 1999]

Legend: 1.Alluvial and loess sediments; 2. Romanian Gravel (Pl1); 3a. Upper Pontian Sand (2Pl32); 3b. Upper

Pontian Clay (2Pl32); 4. The Second coal soil (2Pl3

2); 5. Upper Pontian Dusty sand (2Pl32); 6. The Third coal soil

(2Pl32); 7. The lower Pontian aquifuge sediments (1Pl3

2)

The average annual groundwater quantity pumped by the drainage well system amounts about 12.78*106 m3. To prevent the inflow of groundwater from alluvial layers of the Mlava River to the layout of the mine, a water impermeable screen (figure 2) with the length of 2200 m and the depth of 12-30 m was built in along the southern and south-eastern border of the mine field during the year 1984.

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Figure 2: Location of existing buildings for protection from groundwater (1st January 2006),

as well as of designed buildings (till 31st December 2011) 2.1. Concept of mine protection from groundwater inflow till end of 2011 Till 31st December 2011 the designed drainage wells are distributed in front of the face of mining work in three barrages (LC-X, LC-XI and LC-XII), and along eastern and western sides of the designed open pit mine shape in two barrages (SLA and LB-V) (Figure 2). Wells are fully penetrated and tap water from either alluvial gravels or alluvial gravels and sands in the overlying bed of the third coal layer. The distance between wells in the line tapping only the gravel aquifer is 100 m, while the distance between wells tapping both the gravel and sand aquifers is 75 m. The distance between barrages of wells is about 320 m in western part, and about 500 m in eastern part. The depth of wells is the shallowest in eastern part of the deposit (10 m), and the highest in north-west part of the deposit, and it amounts 144 m. The hydrodynamic analysis of the work effects of the Drmno open pit mine protection system is carried out to the end of the year 2011 inclusive taking into account the layouts of the mine advancing [3 Polomcic and Subaranovic, 2006] for this period have been made yearly. 3. THEORY AND CALCULATION The code selected to develop the numerical model was MODFLOW-2000; a modular, three-dimensional finite difference groundwater flow model developed by US Geological Survey [4 Harbaugh et al, 2000]. The program used in this work is Groundwater Vistas 5.33b (Environmental Simulations International, Ltd.). The hydrodynamic model of the Drmno open pit mine was drafted and completed like a multi-layer model with overall six layers, observed in a vertical profile. Each of these layers corresponds to a specific real layer, separated on the basis of the knowledge of the terrain and the results of conducted analyses of large–scale field exploratory work. The real geometry of schematized layers is represented (simulated) in the model in compliance with the actual spreading of these layers, both in plan and cross-section view. The model is comprised of six schematised layers with 716772 cells in all, among

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which there are 439713 active ones. The discretization of the stream region is with fields ranging from 50x50 m to 12.5x12.5 m in plain. Groundwater flow is calculated in the model as real flow, confined or unconfined in each field of the discretization separately, whereby the conditions of flow in the model have been changed during time in accordance with real conditions. As entering data for the recalibration of the existing model, there were used the data of well capacities of the drainage system and measured groundwater levels in the observing wells, recorded in the field during January 2005 till January 2006, the mean month water table of the Mlava and the Dunavac and sums of precipitation per months [2 Polomcic and Subaranovic 2006]; [5 Polomcic et al., 2006]. In Figure 3, there is shown the distribution of groundwater levels, obtained by the simulation of groundwater regime with the state on 10th January 2006.

Figure 3: Distribution of groundwater levels in the fifth model layer obtained

by simulation of groundwater regime with state on 10th January 2006

3.1. Predict calculations-assumption and dewatering variants Predict hydrodynamic calculations have been realized in the transient flow regime taking into account and assigning all dominant parameters of the open pit groundwater regime. The basic calculating step was one month which at lower level of iterations was divided into 10 parts of unequal duration (factor 1.2). Predict calculations embraced three dewatering scenarios (variants), all of them for the period from 1st

January, 2006 till 31st December 2011: a. Variant 1 – dewatering only by drainage wells beginning on 1st January 2006 b. Variant 2 – dewatering by drainage wells beginning on 1st January 2006 (in the same locations

as in Variant 1), as well as activating a water impermeable screen in the location shown in Figure 4, beginning on 1st January 2008.

c. Variant 3 – dewatering by drainage wells beginning on 1st January 2006 (in the same locations as in Variant 1 excepting new wells in SLA barrage) as well as activating a water impermeable screen in Variant 2, extending the screen in eastern part of the field beginning on 1st January 2008.

Boundary conditions of the model in predict calculations were assigned taking into account both their real impact on groundwater regime and their real values.

� The water table of the Mlava was assigned as the mean value of several years, at the elevation of 71.07 m.

� The water table of the Dunavac channel was assigned by the maintained elevation of water table at the pump station at the elevation of 65.0 m;

� The average vertical infiltration amounts 6.6x10-9 m/s;

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� In the eastern boundary of the model, the recorded groundwater inflow along the layout of the third coal seam wedging, which exists in the nature through loess and gravely sediments, is assigned in the model as the inflow of 10 l/s per km of this layout length.

In addition to these boundary conditions, in predict calculations, there were also assigned boundary conditions which simulate the development of the open pit mine and the mine protection system from groundwater, first of all: the mine layout, drainage wells and the water impermeable screen. The dynamics of connecting and disconnecting, first of all drainage wells, assigned in predict calculations, is given in table 2.

Table 2: Dynamics of assigning of drainage wells in predict calculations

Date of assignment Barrage mark

Number of wells in barrage Kind of assignment

1st January 2007

LC X 31 Well activating SLA 12 Well activating LC VI 9 Stopping work LC VII 11 Stopping work

1st January 2008

LC XI 40 Well activating SLA 5 Well activating LB V 2 Well activating LC-VIII’ 19 Well activating LB-V’’ 2 Stopping work LC-IX 1 Stopping work

1st January 2009 LB-V’’ 6 Stopping work LC-IX 21 Stopping work

1st January 2010

SLA 7 Well activating LB V 4 Well activating LB-V’’ 1 Well activating LC-IX 1 Stopping work LC-IX’ 12 Stopping work LC-X 3 Stopping work

1st January 2011 LC-X 27 Stopping work LC-IX’ 12 Stopping work LC XII 43 Well activating

Scopes of initial well capacities assigned in predict calculations are shown in table 3.

Table 3: Scopes of initial well capacities

Barrage mark Well capacities in aquifer in gravel (the second model layer) (l/s)

Well capacities in aquifer in sand (the fifth model layer) (l/s)

LC X 4 - 8 1.5-7.3 LC XI 4 - 13 1.0-10.0 LC XII 4 - 15 1.5-10.4 LB V 17.5 4.0-12.0 SLA 1 – 3.7 /

A water impermeable screen is placed around the future border of the open pit mine to protect from groundwater inflow from north, west and east into the working space of the mine. The position of the screen is determined depending on the location of the designed layout of the open pit mine and the location of groundwater recharge source [8 Ilic S. et. al., 2006], [9 Subaranovic and Polomcic, 2006]. In relation to the gravel layer, the screen is a fully penetrated, whereby water bearing gravel layer would be cut off [10 Ilic S. et al., 2006]. According to Variant 2, the screen of total length of 4412 m protects the open pit mine from west and north from groundwater inflow (Figure 2). In this Variant, wells of SLA barrage serve for protection from inflow from the eastern side. In Variant 3, the

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proposed screen is with the total length of 6999 m and protects the open pit mine from western, northern and eastern sides from groundwater inflow (Figure 2). Western and northern layouts are identical in Variants 2 and 3. It was included in the defense system from groundwater on 1st January 2008. The thickness of the screen amounts 1.0 m, and the hydraulic conductivity of the screen filling is K = 1x10-8 m/s [11 Subaranovic et al., 2006], [12 Milosevic et al., 2007]. 3.2. Results of predict calculations The results of the Drmno Open Pit Mine dewatering simulation for all three variants of mine protection from groundwater inflow were interpreted and shown in time cross sections at the end of 2008, 2009, 2010 and 2011 years. Maps of piezometric level distribution in the sandy water bearing layer which overlying the third coal soil at the end of each year of the prediction period for the variant 2 are shown in figure 4.

2008

2009

2010

2011

Figure 4: Map of contours of water table in the sand above the third coal seam (Variant 2) Groundwater levels in model cells with the assigned well capacities which have been calculated, are the representative levels in these cells. Each well has been placed in a special discretization field, and the maximal error in the supposition of its location (by coordinates) is to ± ~6 m. According to the shown maps, it can be concluded that in the overlying sand of the third coal layer the significant work effect of drainage wells is noticed, already at the end of the first year of the calculated period. The difference between the flow state of groundwater within bordering lines of the drainage system and the area beyond this line is obvious. By building the water impermeable screen (Variants 2 and 3) the direct impact of water infiltration from the Dunavac channel is stopped, except that, through deeper sandy sediments. The general impact of the water impermeable screen in the dewatering system, which from the moment of its constructing affects the decreasing of overall well capacity in barrages, can be seen in the diagram in figure 5. At the end of the first year of the water impermeable screen existing (31st December 2008) the impact of the screen on the decrease of barrage capacity amounts 42.32 l/s

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(Variant 2), namely 77.16 l/s (Variant 3). At the end of the forecast period (31st December 2011) the impact of the screen can be seen in the decreasing of 111.0 l/s (Variant 2), namely125.2 l/s (Variant 3). Calculated in relation to Variant 1, it means that according to Variant 2, it is required to pump 3.5x109 m3 less groundwater yearly, namely 3.94x109 m3 according to Variant 3.

0

50

100

150

200

250

300

31.12.2005 31.12.2006 31.12.2007 30.12.2008 31.12.2009 31.12.2010 31.12.2011

Q (l/s)

Time

Variant 1

Variant 2

Decrease of summary capacity due to dewatering screen - Variant 2Variant 3

Decrease of summary capacity due to dewatering screen - Variant 3

Figure 5: Diagram of overall annual capacities of all barrages in front of mine northern layout

according to dewatering variants of Drmno open pit mine 3.3. Discussion of variant calculation results In Variant 2 of the open pit mine dewatering with the constructed water impermeable screen in the north, together with the existence and work of designed wells, the inflow of groundwater is decreased as expected because of the infiltration of the water from Dunavac channel in relation to Variant 1. In this calculation Variant the aquifer in gravel is drained even faster, which results in larger number of drained wells which are being disengaged. In Variant 3, which in relation to Variant 2 has the prolongation of the water impermeable screen along the eastern pit layout, the stated situation is even more pronounced. Generally, for open pit dewatering Variants 2 and 3, it stands that the effect of water impermeable screen is pronounced more clearly after the second year of its existence. On the basis of the obtained calculation results, the conclusion is reached that, dynamically observed, the time is the most significant factor in the process of the Drmno open pit mine dewatering. The increase of both capacity and the number of wells does not yield satisfactory effects. On the other side, the existence of the water impermeable screen plays a significant role in the lowering of groundwater level in front of the face advancing layout. The results of the simulation of the mine protection from groundwater have shown that the water inflow from the aquifer in gravel, from the direction of the Dunavac amounts 0.140 l/s/m, and from the Mlava 0.478 l/s/m, while with the water impermeable screen the inflow from the Dunavac direction is reduced to 0.000453 l/s/m, namely from the Mlava to 0.00563 l/s/m. It means that by building in a water impermeable screen from the Dunavac direction groundwater inflow from the gravel will decrease by 99.67%, namely from the Mlava direction by 98.82%. 4. CONCLUSION The existing system for the Drmno open pit mine protection from groundwater inflow does not yield satisfactory effects which can be seen in general increase of groundwater level and insufficient rate of groundwater lowering, especially in front of mining work face advancing. By earlier design solutions the mine protection system was exclusively anticipated by drainage wells. The effects of the mine protection system consisting of drainage wells and the water impermeable screen north, west and east

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of the face advancing layout are analysed in this paper. The carried out calculations together with the techno-economic analysis have pointed out significantly higher effects in the lowering of groundwater level and the decreasing of inflow in the mine with the participation of the waterproof screen, with lower costs of completion and maintenance. REFERENCES [1] Pusic M., Polomcic D., Radonic S. et al.: Simulation of groundwater regime developing a hydrodynamical

model of the open cast mine “Drmno” in Kostolac coal basin. Mining Science and Technology Vol 3. No. 1-4. Belgrade, 1999, pp. 7-21.

[2] Pusic M., Polomcic D.: Hydrodynamical model of dewatering of open pit "Drmno". Proceedings of XII Yugoslav Symposium of Hydrogeology and Engineering Geology. Book I. Novi Sad, Serbia, 1999, pp. 293-302.

[3] Polomcic D., Subaranovic T.: Test of dewatering screen model on example of Drmno open pit mine. VII International Conference NONMETALS. ISBN: 86-7352-174-2. Yugoslav Opencast Mining Committee. Belgrade, 2006, pp. 327-334.

[4] Harbaugh A.W., Banta E.R., Hill M.C. and McDonald M.G.; MODFLOW-2000: The U.S. Geological Survey Modular Ground-Water Model. User Guide to Modularization Concepts and the Ground-Water Flow Process, U.S. Geological Survey Open-File Report 00-92, Reston, VA, USA, 2000, pp. 121.

[5] Polomcic D., Dimitrijevic B., Ilic S.: Establishing of hydrodynamic model of Drmno deposit. VII International Conference. NONMETALS. ISBN: 86-7352-174-2. Yugoslav Opencast Mining Committee. Belgrade, 2006, pp. 321-326.

[6] Subaranovic T., Dimitrijevic B., Majstorovic J.: Optimization of system for groundwater protection on open pit coal mine Drmno, Proceedings of the IX National Conference of the Open and Underwater Mining of Minerals with International Participation, ISBN: 978-954-91547-8-8, Varna, Bulgaria, 2007, pp. 90-97.

[7] Pavlovic V., Subaranovic T., Jocic B.: Significance of monitoring and administration of dewatering wells for protection of coal open pit mines from ground water intrusion, Proceedings of the 7-th European Coal Conference, ISBN: 978-966-02-4855-7, National Academy of Sciences of Ukraine, Lviv, Ukraine, 2008, pp. 136-140.

[8] Ilic S., Polomcic D., Dimitrijevic B., Dimkic G.: Analysis of current technologies of dewatering screens construction in Serbia. VII International Conference NONMETALS. ISBN: 86-7352-174-2. Yugoslav Opencast Mining Committee. Belgrade, 2006, pp. 106-110.

[9] Subaranovic T., Polomcic D.: Selection of location for dewatering screen construction on Drmno open pit mine. VII International Conference NONMETALS. ISBN: 86-7352-174-2. Yugoslav Opencast Mining Committee. Belgrade, 2006, pp. 400-405.

[10] Ilic S., Polomcic D., Jovovic S., Zivkovic D.: Additional geologic explorations for needs of dewatering screens construction on open pit mine Drmno. VII International Conference NONMETALS. ISBN: 86-7352-174-2. Yugoslav Opencast Mining Committee. Belgrade, 2006, pp. 111-121.

[11] Subaranović T., Ilic S., Krstovic S.: A contribution to exploration for construction of waterproof screen on open pit mine Drmno, Underground mining engineering, No15, UDK 62, YU ISSN 0354-2904, Faculty of Mining and Geology, Belgrade, Serbia, 2006, pp. 107-112.

[12] Milosevic D., Subaranovic T., Milanovic R.: Overview of results for Screen model examination on open pit mine Drmno in Kostolac coal basin, Proceedings of the IX National Conference of the Open and Underwater Mining of Minerals with International Participation, ISBN: 978-954-91547-8-8, Varna, Bulgaria, 2007, pp. 73-81.

[13] Pavlovic V., Subaranovic T.: Visibility Analysis of Manufacturing Waterproof screen on the example of open pit Drmno. VIII International Conference of Surface Mining, Vrujci Spa, Serbia, 2007, pp. 203-207.

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621(082) 621:004(082) 005.6:621(082) INTERNATIONAL Conference "Research and Development in Mechanical Industry" (11 ; 2011 ; Sokobanja) Proceedings. #Vol. #2 / 11th International Conference "Research and Development in Mechanical Industry" - RaDMI 2011, Sokobanja, Serbia, 15-18. September 2011. ; [organizer] SaTCIP [Scientific and Technical Center for Intellectual Property], Vrnjačka Banja ; editor Predrag V. Dašić. - Vrnjačka Banja : Scientific and Technical Center for Intellectual Property, 2011 (Vrnjačka Banja : Scientific and Technical Center for Intellectual Property). - XXI str, str. 605-1346, XI str. : ilustr. ; 24 cm Tiraž 80. - Str. VII: Preface / Predrag Dašić. - Bibliografija uz svaki rad. - Registar. ISBN 978-86-6075-028-2 1. Scientific and Technical Center for Intellectual Property (Vrnjačka Banja) a) Машинство - Зборници COBISS.SR-ID 186416140