Годишник на МГУ 45/2002 - МГУ "Св. Иван Рилски"

JOURNAL OF MINING AND GEOLOGICAL SCIENCES, Vol. 45, Number 1
ISSN 0387 5467 (print)
СЪДЪРЖАНИЕ
CONTENTS

Geology
Dimitar Sinnyovsky, Boris Valchev, Dimka Christova-Sinnyovska Cretaceous/Tertiary boundary in the Carpathian type upper Cretaceous near the village of Kladorub, Vidin district	1
George Ajdanlijsky Cyclicities in the Svidol formation near Cerovo village, NW Bulgaria	7
Manol Antonov, Venelin Jelev Ductile shear zone and brittle faults in the southwestern slope of Zlatitsa-Teteven mountain (Central Bulgaria)	13
Milorad Vatsev Composition of paleogene volcanics in the region of Arda mountain, South Rhodopes	21
Milorad Vatsev Paleogene accretionary lapilli tuffs in Mesta graben (South-Western Bulgaria)	27
Mineral deposits
Petko Popov Alpine geotectonic evolution and metallogeny of the eastern part of the Balkan peninsula	33
Sergey Dobrev, Strashimir Strashimirov, Margarita Vassileva, Haralampi Dragiev Silver and silver-bearing phases from Chala and Pcheloiad deposits (Eastern Rhodopes) and Eniovche deposit (Central Rhodopes)	39
Svetlozar Bakardjiev Alpha stable geostatistical model in mineral resources evalution	45
V. Georgiev, B. Kolkovski, N. Metodiev, P. Milovanov Metallogeny of the Zlatoustovo volcano-tectonic depression (Eastern Rhodopes)	51
Kamen Popov Geochemical associations in Radka ore district	57
Sergey Dobrev Peculiarities of Pb-Zn mineralisation in deposits from Yugovo ore field	65
Margarita Tokmakchieva Valuable minor components in the composition of porphyry copper deposits	71
Margarita Vassileva, Zhelyazko Damyanov, Vasil Atanassov Dolomite-group ferroan carbonates from Kremikovtsi deposit	77
Efrosima Zaneva-Dobranova, Peshka Stoeva, Evgenia Alexandrova Rock abrasivity in open-pit coal mines	83
Vasil Atanasov The ancient gold mine Perperikon near the village of Stremtsi, Kurdzhali region	89
Anton Sotirov, Thomas Rainer, Jordan Kortenski Relationship between the reflectance of the maceral groups from coal with different rank	97
Vassil Balinov, Efrossima Zaneva-Dobranova Physical aspects of oil-recovery in Selanovtsi type oil fields	101
Hydrogeology
Nikolay Stoyanov, George Ajdanlijsky Comprehensive approach for 3D simulation by mathematical modeling of groundwater contaminati	105
Applied geophysics
Stefan Dimovski, Sergei Sevdanov Elements of the geologic structure of the Belasitsa-Ograzhden block according to geophysical data	109
Boyko Ranguelov Complex geological and geophysical investigations in Antarctica	117
Drilling engineering
Nikolay Tchervenakov Numerical modelling of drill well packer by using finite element method	121
Rumen Kulev New technology and tools for gas well testing Chiren undergroud gas storage	127
Education
Ruslan Kostov The mineralogical education in Bulgaria as exposed in textbooks from the XIX and first half of the XX century	129
Julia Ilcheva Interdisciplinary relations in training in physics at the UMG	133
Julia Ilcheva, Petar Galanov Innovations in physics laboratory practice in university	137
Varia
Jordan Jordanov, Christo Kazandjiev, Vassil Belogoushev The geological exploration activity (GEA) and the coal mining industry (CMI) as envisaged in the energy strategy of Bulgaria	143
Detelin Dachev, Kristina Marhova Some intstitutional issues related to environmental impact of mining and industrial enterprises	149
Nikola Murhov, Pavel Milev, Nikolai Petrov, Kiril Papadopulos Granite – the eternal decorative rock material	153

JOURNAL OF MINING AND GEOLOGICAL SCIENCES, Vol. 45, Number 2
ISSN 0387 5467 (print)
СЪДЪРЖАНИЕ
CONTENTS

Koyno Boev, Stanislav Topalov Analytical-geometrical method for assessing the orebody geological complexity	1
Georgi Mihaylov, Georgi Georgiev Creating an algorithm and technical solving to choose optimal method of opening for underground mine	5
Violeta Ivanova, Luben Totev, Iliya Patronev Influence of engineering geological factors on the choice of way of an underground working	11
Gergana Kamburova, Slavcho Lazarov New effective and ecollogically frinedly technology for demolition of blast demolition of excise dimension rocky pieces with cumulative action charges	15
Stoyo Todorov Standart requirements and conditions of railway track inside lines in MP Debelt	19
Georgi Mihaylov, Georgi Trapov A probability approach to analysing and assessing some natural and technogenic factors and their influence on the risk level in selecting an optimal mining technology solution	23
Michael Michaylov Expert system for assessment of risk from spontaneous combustion	27
Kolyo Kolev, Sergey Boyanov Change of parameters of rock deformation in gipsum mine “Koshava” depending on their strained state	37
Antoaneta Boteva A method for selective technological flowsheets synthesis	41
Konstantinos Gudulas Magnetic separation of chromium-containing laterites	47
Konstantinos Gudulas Magnetic properties of chromium-containing laterites	55
Antoaneta Boteva Technological possibilities for pulp density alteration at Elatzite flotation mill	61
Antoaneta Boteva, Blagovesta Vladkova New selective colector for flotation of sulfide ores	67
Antoaneta Boteva Preliminary treatment of the copper slags	71
Antoaneta Boteva, Hristina Petrova Research work of the impact of the pulp agitation floatation speed at different density on adsorption of sulpho hydrillic collectors	75
Antoaneta Boteva, Serafim Saavidis Research work of the foam regulation mechanism in floatation of cassiterite with oxyhydrillic collectors	81
Kremena Dedelyanova, Metodi Metodiev Vibratory column flotation machine – vibratory – acoustic and technological researches	85
Georgy Klisuranov, Reneta Кlisuranova, Raycho Donchev New ferro-magnetic heavy media for suspensional dressing of coals	89
Valeria Kovatcheva-Ninova, Nina Nikolova, Marin Marinov Investigation the adsorption properties of the natural adsorbents zeolite and bentonite towards copper ions	93
Valeria Kovatcheva-Ninova, D. Dimitrova Studies the impact of low-frequency acoustic field upon cation exchange capacity of natural zeolite	99
Lubomir Kuzev, Nikolay Hristov, Staiko Seksenov The working media influence on the kaolin vibrodelamination	105
Lubomir Kuzev Industrial trials for the Strupetz stuffing quartz mass in steel casting	109
Nedyalko Sofroniev Synthesis of hydrobromide of 2-(Glycylcystinylamino) – 2-(4-Methoxyphenyl)-1,3-Indandione and investigation of its effect on some functions of isolated liver mitochondria	113
Antony Angelov, Stoyan Groudev Treatment of gold-bearing solutions by cementations with metallic zinc	117
Svetlana Bratcova, Stoyan Groudev, Plamen Georgiev The effect of some essential environmental factors on the microbial dissimilatory sulphate reduction	123
Slaveyko Tsvetkov Observation and study of pollution in the region of the “Lead-zinc factory” – Kardzali	129
Lubomir Kuzev Environmental and technological problems with separation of “Maxim” waste dump material	137
Hristo Stoev, Dimitar Hristanov, Evstati Dimitrov, Veliana Stoianova Feasible solutions for uranium production sites demolution	143
Меtodi Метоdiev Utilization of waste oil-derivatives	147
Nina Nikolova, Stefan Stamenov, Valeria Kovacheva-Ninova Using of modified zeolites for purification of heavy metals ions from wastewater	151
Radi Ganev, Michael Michaylov On safe combustibility of mixtures of propellants and polymers for mines and quarries	155
Gergana Kamburova Toxic gases at industrial blasting operations. Normative requirements and recent results	159
Evgenia Alexandrova Drawing up integrated mechanization structures for humus land reclamation in coal mining	163
Plamen Georgiev, Stojan Groudev, Svetlana Bratkova Generation of polluted drainage waters from slag and slime dumps in a steel – making plant	167
Stojan Groudev, Irena Spasova, Rainer Schutte Two-stage microbial leaching of copper and precious metals from a sulphide ore	171

JOURNAL OF MINING AND GEOLOGICAL SCIENCES, Vol. 45, Number 3
ISSN 0387 5467 (print)
СЪДЪРЖАНИЕ
CONTENTS

Ilia Iochev Investigation of mine hoist with multi-layered coiling of hoisting rope	1
Hristo Sheiretov Ascertaining the methodology for apron feeders calculation	5
Venelin Tasev Method for dimensioning of high power centrifugal ball clutches	9
Venelin Tasev Operative thermal protection of centrifugal ball clutches	13
Georgy Fetvadjiev Work volume evaluation of rotary roller pneumatic motors	17
Georgy Fetvadjiev, Diana Decheva, Zdravko Iliev Computer design of mine pneumatic networks	21
Raina Vucheva, Viara Pojidaeva Friction, deformatons and tensions in the shafts of mills with planetary mechanisms	25
Raina Vucheva, Antoaneta Ianeva Some peculiarities of the choice of bearing unit of centrifuge-roll mills	27
Slavcho Donchev, Stefan Pavlov A boundary analysis of round plates by shear force calculation	29
Kargiotis E., Godulas K., Chathtsiavigustis T., Vatalis K., Manoliadis O. Impact of the ball-crusher grinding ball load and the number of revolutions on the selective grinding in the process of dressing of chromite-bearing soils of the Vurinos otholite complex, West Macedonia – Greece	33
Julian Dimitrov, Michail Chalashkanov Research of the process of refinement at centrifugal roller mill with means of dimensional analysis	37
Kristina Grozeva, Ivan Minin Chemical methods for processing plants machines slag cleaning	43
Viara Pojidaeva Diagnostics of rolling bearings of machines for extraction and procession of rock materials	47
Marin Tzvetkov, Kristina Grozeva About some technological performances of diamond circular blades for cutting rock materials	49
Marin Tzvetkov, Kristina Grozeva Technology for working granite materials for single thick products	51
Stefan Stefanov, Ivan Milev, Angel Zabchev A method for determining the insulation parameters of three-phase networks with voltage up to 1000 V with insulated star centre of the transformator	53
Evtim Kartselin, Romeo Alexandrov, Kiril Negrevski On the necessity of developing and implementing a controllable electric drive for mine chain conveyors in underground coal mines	57
Evtim Kartselin Mathematical models for investigating mine power systems	59
Angel Zabchev, Rumen Istalianov Automatic control of pumps for water pumping drainage on the basis of timer 555	63
Athanasios Papavasileiou, Emil Gegov CAD and CIM systems: state of the art and development trends	67
Athanasios Papavasileiou, Emil Gegov, Konstantinos Gavros, Nikolaos Sariannidis Methods for decision – making and risk assessment in the design of technological equipment	71
Athanasios Papavasileiou, Konstantinos Gavros, Emil Gegov Application of the artificial intelligence methods in CAD/CAM/CIM systems	75
Diana Decheva, Hristo Iontchev Generating accurate plans of third-degree models with improved factor of multicolinearity	81
Julian Dimitrov Recognotion of symmetrical shapes in scanned mechanical drawings	87
Julian Dimitrov Automatic reconstruction from scanned image of mechanical drawing in axonometry	93
Lubomir Georgiev, Vasil Angelov On the equivalence of differential systems arising in electromagnetic two-body problem	99
Vasil Angelov On j-lipschitzian mappings in pseudometrically convex	103
Konstantin Trichkov, Boryana Petrova Assessment ff losses in power electronic structures in key mode	107