ISSN 1454-9174 ANNALS OF THE UNIVERSITY OF PETROSANI MINING ENGINEERING vol. 10 (XXXVII) UNIVERSITAS PUBLISHING HOUSE Petroşani – ROMÂNIA, 2009 ISSN 1454-9174 EDITOR OF PUBLICATION Prof.dr.eng. Ioan-Lucian BOLUNDUŢ ADVISORY AND EDITORIAL BOARD OF MINING ENGINEERING ISSUES ADVISORY BOARD Prof.dr.eng. Nicolae DIMA - University of Petroşani Prof.dr.hab.eng. Dr.h.c. Lev Alexandrovici PUCIKOV - Moscow State Mining University Russia Prof.dr.hab.eng. Suvalov Iuri VASILIEVICI - State Mining Institute – Sankt Petersburg - Russia Prof.dr.hab.eng. Monika HARDYGORA - Politechnika Wroclaw - Poland Prof.dr.hab.eng. Dr.h.c. Carsten DREBENSTEDT - Technische Universität Bergakademie Freiberg - Germania Assoc.Prof.dr.eng. Ventzislav IVANOV - University of Mining and Geology- Sofia - Bulgaria Prof.dr.eng. Jöszef BÖHM - University of Miskolc – Hungary Prof.dr.eng. Pavol RYBAR - Technical University-Kosice- Slovacia Prof.dr.eng. Dumitru FODOR - University of Petroşani Prof.dr.eng. Mircea GEORGESCU - University of Petroşani Prof.dr.eng. Vlad CODREA - University Babeş-Bolyai of Cluj Napoca Prof.dr.eng. Sanda KRAUSZ - University of Petroşani Assoc.prof.dr.eng. C-tin LUPU - INSEMEX of Petroşani EDITORIAL BOARD Editor-in-chief: Prof.dr.eng. Ilie ROTUNJANU - University of Petroşani Associate editors: Prof.dr.eng. Ioan DUMITRESCU - University of Petroşani Prof.dr.eng. Petru HODOR - University of Petroşani Prof.dr.eng. C-tin SEMEN - University of Petroşani Prof.dr.eng. Romulus SÂRBU - University of Petroşani Prof.dr.eng. Eugen COZMA - University of Petroşani Editor Secretary: Lecturer dr. eng. Emilia DUNCA - University of Petroşani Editorial office address: University of Petroşani, 20 University Street, 332006, Petroşani, Roumania, Phone: (40)54/54.29.94, 54.25.80, 54.25.81, 54.25.82, 54.97.49, Fax: (40) 54/54.34.91, 54.62.38; www.upet.ro, Email: [email protected] Annals of the University of Petroşani, Mining Engineering, 10 (2009) 3 CONTENTS ARISTID BOYTE, IONUŢ PREDOIU - Modern criteria for seismic effect assessment in hard rock quarries………………………………………………………………. 7 IOAN DUMITRESCU, VALERIU PLEŞEA - Present and perspective tendencies regarding efficiency of coal longwall exploitation……………………………………..…… 21 W. FAHLE, S. KÖRBER - Exploration and selective extraction of stones and rocks in overburdens of Lusatian open-pit lignite mines……………………………..…… 27 ADRIAN FLOREA - Computerized waste dump design – Petrila…………………..…….. 37 TUDOR GOLDAN - Storage in underground space……………………………………….. 45 JOSEF HALIR, HANA LORENCOVA, LUKAS ZIZKA - Mine water streams in the central part of the north Bohemian brown coal basin……………………………………. 51 C-TIN LUPU, ION TOTH, CRISTIAN TOMESCU, EMERIC CHIUZAN, DOREL TAMAŞ - Aspects regarding the marketing of methane from the coal mines as an alternate power generating source………………………………………………………… 55 C-TIN LUPU, I. TOTH, CORNEL GLIGOR, DORU CIOCLEA, M. MORAR, E. CHIUZAN - Increasing impermeability of the sealing workings in the Romanian mines……. 63 MIHAELA TODERAŞ - The geotechnical characterization of the emplacement conditions of Mihoiesti dam……………………………………………………………………. 69 M. MIKOLÁŠ, F. FRAUS - Geotechnical properties of soils of the Podkrušnohorská Výsypka dump in Sokolov brown coal field and their long term trend……………………. 79 I. TOTH, C-TIN LUPU, D. CIOCLEA, E. CHIUZAN, MARIUS MORAR, C TOMESCU - Preventing the occurence of spontaneous combustions in hard coal mines by the help of zinc chloride sprayed particles…………………………………………………. 95 VALERIU PLEŞEA - Constructive and functioning improvement solution of the sliding steel timbering for underground excavations stability………………………………….. 101 I. ROTUNJANU, M. LAZĂR - Observations and considerations on the hydrostatic level of groundwater in the sterile dumps of the Roşiuta open pit -E.MC. Motru………… 107 SIMONA TODERAŞ - The safety of Valea Săliştei tailing dam…………………………… 113 4 Annals of the University of Petroşani, Mining Engineering, 10 (2009) D. SIMKE - Power electronic starter for slipring rotor motors…………………………… 125 ION TOTH, CLEMENT IONESCU, LORAND TOTH, CLEMENTINA MOLDOVAN - Preventive methods against spontaneous combustions based on phosphate-type inorganic inhibitors used in coal mines which employ bed undermining………… 133 VIOREL VOIN, ILIE ROTUNJANU, MARIA LAZĂR - Aspects concerning the stability of the sterile heaps from Jiu Valley………………………………………………… 141 ALINA (CHIŢAC) LORINŢ, ROMULUS SÂRBU - Modern methods for processing the coal slurry form Coroesti settle pounds……………………………………………….. 147 CAMELIA BĂDULESCU, EUGEN TRAISTA - Researches regarding the inertization of the chemical muds which have a content of heavy metals............................................ 153 NADEŽDA ĆALIĆ, MIROSLAV GLUŠAC, MIROSLAV IGNJATOVIĆ – Limonite concentration from mud…………………………………………………………. 165 NICOLAE CRISTEA, GEORGETA CRISTEA - Kinetic study of fine coal flotation using different reagent systems……………………………………………………….. 173 SANDA KRAUSZ, NICOLAE TOMUS, LILIANA CIOBANU, E. CRACIUN, ST. CRACIUN - The auriferous pirites roasting in the microwaves field on the cianydation results field from coal washing process………………………………………………… 181 ROMULUS SÂRBU, ADRIAN CORUI - The coagulation of argillaceous suspensions from wastewater in electric…………………………………………………………….. 191 P. M. SOLOZHENKIN, A. GORNOSTAL, A. M. MICHNEA, P. ILIE - Synthesis of the modified reagents and their use for the flotation of ores from various deposits….. 201 ROLAND MORARU, GABRIEL BĂBUŢ - Practical guidance principles in occupational risk assessment processes ……………………………..……………………….………. 215 ROLAND MORARU, GABRIEL BĂBUŢ, LUCIAN-IONEL CIOCA - Risk interpretation and decision making in occupational risk management …………………………………………. 223 SORESCU FLORIN - MARIN - Analysis of prescriptions and of existing norms from our country and from abroad that are regulating the activity of identification, assessment and control of the fire risks inside the storage areas for tanks of combustible liquids.. 231 SORESCU FLORIN - MARIN - Explosions leading to fire generation……………………. 239 GABRIEL BĂBUŢ, ROLAND MORARU, LUCIAN-IONEL CIOCA - Workplace health and environmental risk assessment of nanomaterials - present state and challenges… 245 Annals of the University of Petroşani, Mining Engineering, 10 (2009) 5 R. BÖHNER, C. NIEMANN-DELIUS - Monitoring and forecasting the particulate matter pollution caused by surface mines………………………………………………… 253 M. LAZĂR - Ecological rehabilitation in the mining basins of Oltenia……………………. 259 CIOLEA DANIELA IONELA, DUNCA EMILIA, CRISTEA NICOLAE - The effects the atmospheric sulfate particles and fine particles – PM2,5 have on health………….. 265 VASILE GRAMA, TUDOR GOLDAN - The socio-economic costs of climate change……. 273 TUDOR GOLDAN, CIPRIAN DANCIU - The approaches of risk in climate change…...… 281 RAREŞ MUNTEANU - Sustainable development in Jiu Valley………………………….… 287 SIMONA TODERAŞ - Aspects regarding the environment pollution sources in Roşia Montana…………………………………………………………………...… 291 CRISTIAN-MARCEL FELEA - Critic of the marginal people phenomenon that follows mines reorganization in Romania……………………………………………………...… 303 EMILIA-CORNELIA DUNCA, DANIELA-IONELA CIOLEA - L’etude stationnel sur les depots des steriles du Petrila, Roumanie.................................................................. 309 POSTOLACHE MIHAELA - Petrographic nature and modal mineral composition of psammitic gneisses which form Lainici – Paiuş group from the Jiu Gorge……….. 319 CSABA LORINŢ, GRIGORE BUIA - Zeolites – “the stones that boil” – a natural way of cleaning up nature………………………………………………………………. 323 CATRINA IOANA - Current issues of the concurrencies market in business engineering acceptance……………………………………………………………. 331 Index of authors ……………………………………………………………………………... 337 Instructions for authors ……………………………………………………………………… 338 Annals of the University of Petroşani, Mining Engineering, 10 (2009) MODERN CRITERIA FOR SEISMIC EFFECT ASSESSMENT IN HARD ROCK QUARRIES ARISTID BOYTE* IONUŢ PREDOIU** Abstract: Following the growing rate of explosives use in blasting operations in opencast mining, and mainly the explosive loads employed in blasts, major implication consequences are induced, concerning the seismic effects on quarries slope stability. The need for understanding the occurrence mechanism of the phenomenon and the prevention measures and techniques of these “mining earthquakes”. Blasting operation seismology in hard rock quarries should approach the issues of seismic wave’s generation and physical-mathematical modeling of the blasting process. In order to solve the various related theoretical and practical issues, the development of adequate design norms and techniques are required ( taking into consideration the blasting process specific parameters) together with of employing the needed explosive amount to provide a minimal knowledge regarding seismic wave propagation. 1. INTRODUCTION The continuously increasing industrial and economical growing rate involves, among others, a significant growth in explosive use in mine or quarry blasting operations, in excavation works for civil engineering and infrastructure projects, in tunneling and other kind of workings. As a direct consequence, the industrial blasting operations are representing a basic problem for researchers and professionals in the field, illustrated by a large number of technical and scientific work carried out worldwide. Following the growing rate of explosives use in blasting operations in opencast mining and mainly the increasing explosive loads are raising major implications basically