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The open pit Veliki Krivelj is a copper mine which operates within RTB Bor Group in Serbia. In 1998 a combined haulage system involving the initial dump truck haulage, crusher, belt conveyor and a boom spreader for waste disposal was designed and installed in order to reduce the costs on overburden removal. The designed productivity of the system is 4 700 t/h and it will be fully operational in the next few weeks. Up to date it has been capable of achieving maximal 50% of this productivity because only one of two ...

Titanium is a biocompatible material used in dentistry as una lloyed (minimum purity 99.4%) and alloyed, the most widely used is TiAl6V4 despite some reservations about the releasing of Al and V ions, which can be accumulated in the tissues. To increase the surface contact between the implant and bone, facilitating osseointegration the implants are coated with titanium or ceramic mate rials leading to a ro ughness surface which creates conditions for bone growth, resulting a better anchoring between the implant an...

In the context of sustainable development the problem of water pollution has a greatest importance due to the necessity of ensuring a clean environment for the next generation. Water quality standards provide the framework of accepted water parameters: chemical, physical, microbiological, biochemical, radiological. The European standards show the sampling method and terminology accep ted for that in according with macro- regional environmental conditions. In the present conditions, a good standard of life for peop...

Construction Sand production is done mostly by small mining companies and, because its price is distance dependent, it must be mined as near as possible to its final use, the cities, causing locational and environmental conflicts with economic and socio- environmental impacts. The Piranema Sand District is no exception. Located at 70 km from downtown Rio de Janeiro city, Brazil, its 70 small mining companies are the main suppliers of the Rio’s Metropolitan Area, w ith 90% of its demand: a critical success factor...

The paper deals with some factors influencin g the values of sandy soils shear strength parameters, obtained by direct shear test (DST). Influences of density, shear area changing and number of specimens on the test result of clayey sand (SC) and sand with some fines (S-F) are examined. Influences of the density on the values of sandy soils shear strength parameters will be introduced in the paper by the tests with density index 6 . 0 ; 3 . 0=DI and 0.9. Influences of the shear area changing on the values of sandy...

The increase of the demands for quality in th e EU is caused by the fact that customer’s satisfaction is no longer enough; the expectations must be overcome by promoting the concept “Beyond Customer Satisfaction”, which determined the orientation of the Romanian companies toward s implementing the Quality Management System. This paper aims at analysing the impact that th is implementation system has on the analysed company's financial and economic results involv ed in such a process. This diagnosis, during 2...

Efficient protection and construction of engine ering and other struct ures in seismically active areas is a series of contradictions, where an optimum solution must be found, which does not comprise a compromise at the expense of safety and security of the people, and which minimizes damage of property. Along with the increase of the needs for energy, the need for open pit mining production increases, which is related to the mass blasting with incr easing quantities of explosive, and nearing to the population cen...

During the last decades an increase of the number of extreme natural events has been observed all over the world. Drought in Southeastern Europe is among the extreme events, which might have significant negativ e impacts on the socio-economic sectors. Drought in Bulgaria has been in details studied by many researchers, but being a problem of vital importance, is continuously considered with enhanced attention. 50- years time series of precipitation, collected from 20 weather stations located at the Maritsa and Tun...

In this paper we analysed timber and timber based products as renewable materials that can be reused, recycled or used as ener gy source, with minimal waste. In civil engineering the main aspects of environment are: consumption of material and energy for constructing purposes, and emission of harmful materia into the environment during the life cycle of construction. Forest regene ration has certain significance in the system of sustainable development. Wood degradates easily which is an advantage considering the ...

An information retrieval technique that could be used successfully in the E-Learning domain is provided in this article. The described system is based on a relevancefeedback scheme. It retrieves relevant documents from an information database, those documents being useful in the learning process. The proposed system is an interactive one, the human user being involved in the retrieving process.

Water quality is one of the most important element for life support and contribute at the sustainable develop of human society. Following the technical and economic transformations taking place in industry, waste water remediation system required new approaches to management in this area. It recorded an increase in the variety and complexity of the types and quantities of waste generated in the last years and for administrated this situation are necessary new methods and equipments of waste neutralisation or trans...

Waste deposing is the most important problems for a sustainable development of our societies. In this paper is shown some models, for determinate the exploitation with optimum fees of the waste deposing on the landfill. The model take in account local condition of warehousing, the existing of sorting technology, technical and managerial abilities in waste management, the support for an efficient strategy in regard to tariffs, billing and bills collections. The overall objective is to develop the necessary infrastr...

This paper highlights several aspects regarding energetic and functional advantages of hydraulic transmissions based on adjustable volumetric machines, located in their primary and secondary sectors. To this end, numerical simulations were performed upon hypothetic hydraulic transmissions of primary or secondary adjustment, as well as numerical simulations and experimental research on MOOG radial piston pump type RKP-D. This servo pump, which can operate either in closed loop of flow or in closed loop of pressure,...

The aim of the present research work is to investigate the possibility of adding a mixture of non-granulated blast furnace slag (NGBFS) and steel slag, two wastes resulting from metallurgical industry which underwent calcinations previously, in the raw meal for the production of Portland eco-cement clinker. For this purpose, the NGBFS and steel slag from ArcelorMitall Steel Galati were analyzed for chemical, mineralogical and heavy metals contents. Two samples of raw mixes were prepared, one with typically raw mat...

The possibility to obtain new eco-compatible building materials by milling, pressing and direct sintering of secondary raw materials (SRM) derived from a physical/mechanical treatment of municipal solid waste incinerator (MSWI) bottom ashes is discussed. The chemical compositions and particle size distribution of used SRM press powders were evaluated using XRF analysis and by laser granulometer, respectively. The thermal and densification behaviours were studied by non-isothermal DTA-TG and dilatometric techniques...

All European papers consider the efficiency and quality of education as a fundamental premise of social cohesion, economic growth and sustainable development in the transition towards a knowledge society. The major reform processes initiated by the government in higher education, decentralization and quality management, are fully compatible and convergent with the European direction of reform in order to achieve the fundamental objectives of the ’Lisbon Process’. Debt of any institution of the national educati...

The paper presents a hydraulic system used for the recovery kinetic energy from the road motor vehicle in the braking phases and using it, in the acceleration phases, in order to energy saving of the motor vehicles. All the system is conceived like a mechatronics system, for the medium and heavy motor vehicles. The hydraulic system allows the extrapolation to different sizes of vehicles and can be mounted on new motor vehicles, as well as old cars, in the framework of rehabilitation actions. The energy recovery hy...

The main problem of restoration of localities of the North Bohemian Brown Coal Basin is the occurrence of overburden rocks from the series of rocks of coal seams. Representative example of these localities is the Strimice dump. This report briefly summarises the history of reclamation of this dump. Main attention is devoted to the result of application of fertilizable rocks and to the results of the research of the area retained for natural succession.

This paper considers potential changes in storm occurrence and intensity over the western Black Sea through analysis of long term series of wind and wave conditions simulated with relatively high resolution. It is a result of coupling of atmospheric and wave models and spans period of more than 60 years (1948-2008). On the basis of the established methodology of wave climate clustering, wave events capable of producing a noticeable morphological response are separated from the remaining part of the dataset. Furthe...

A review of extreme storm events along the Bulgarian Black Sea coast is of interest for wide spectrum of readers – oceanographers, meteorologists, engineers, economists, decision makers and stakeholders. Reasonable management of the coastal zone demands a reliable and timely forecasting of storm events and evaluation of the related potential damages and economical losses. This paper focuses on the heavy storm of February 1979. The aim of the study is reconstruction of all stages of the storm on the basis of avai...

The Middle and Upper Jurassic deposits develop on a large area in Dambovicioara Corridor. In this area belongs both to the “Group of the formations of Braşov” ([8], [9] redefined, emend [3]) and to the “Group of the formations of pre-Leaota” ([9], emend [3]). The group of Braşov covers strictly the area of D\^ambovicioara Basin, and the group of pre-Leaota was extended as well over the fosse Codlea-R\^aşnov-Podul D\^amboviţei and over Şinca-Piatra Craiului [3]. The facies of the two groups are differe...

The difficulty in reclamation of the North Bohemian Basin dumps consists in extremely severe properties of rocks in most of the dumps. It mainly concerns the rocks of the overlaying formation and the formation of brown coal seams. Sands, kaolinitic clayey sands and kaolinitic and illitic clays are the main materials bulk to the dumps. The admixtures of the bulk rocks consist of organic coal, siderite and pyrite. These rocks are mechanically unstable against wind and water erosion and they have obtained adverse, ac...

The process of truck shovel assignment for optimization of the transport systems in open pit mining is performed using software models and algorithms. With the aid of the software and hardware mechanisms, great steps can be taken in intelligent assignment and control of truck shovel systems. In this paper, open pit mining transport system has been modeled based on TSP modeling. Using genetic algorithms, the optimized travelling path for trucks has been obtained. The software has the capability of compound modeling...

The truck and shovel transportation system is the most important part of the open pit mining operation because a considerable amount of the total mining costs is related to it. Reducing the transportation cost has a great impact on reduction of the total cost. One method to reduce the cost per ton in transportation systems is the optimization of the truck–shovel assignment. In this paper, software has been developed for optimal assignment of N trucks to M shovels with different grades of the minerals, based on m...

The legislative framework for the environmental protection in Romania, as a European Union member state, has carried a new approach in the management of the perimeters affected by the industrial activities. At the national level, efforts are made to implement a number of projects (e.g. ISPA [The Instrument for Structural Policies for Preaccession] – Environment) that would lead to a better administration of waste materials associated with these activities (e.g. recycling in the economic circuit or the easy reint...

Nowadays the importance of brown coal as a raw material is caused by growing needs of power in the Czech Republic. It namely concerns the only major domestic fossil raw material without which our country would become fully depended on the import of energy resources. Over 70\% brown coal reserves have been exploited in the North- Bohemian Basin today. Opencast mining of brown coal naturally led to vast landscape damages. Therefore reclamation work has acquired great significance. Brown coal is mined in four general...

Analytical model of the stress-deformed state of the rock mass in production mining is proposed. In comparison with conventional ones, the model takes into account the depth of coal extraction, thickness seam and the existence of the total zone of mining subsidence displacement. As is shown by calculations, effect of said factors results in complete reconsideration of the stress-strain state pattern of the rock mass and may serve as the basis for the development of mining subsidence displacement theory.

Rockfalls are natural process of cliff and hillside erosion, can be simulated by the computer programs. They consist of large rock fragments from a cliff, or boulders from a slope that bounce, roll, and slide down a hillside and come to rest in a “runout” zone at or near its base. Rockfalls are a major hazard in rock cuts for highways and railways, and in mountainous terrain. Rockfalls are generally initiated by some climatic or biological event that causes a change in the forces acting on a rock. These events...

The demands existing at the European Union level impose a new approach of the problems concerning the mining exploitation from the point of view of the effects and pressure exerted by them over the environment and of all the consequences of the socioeconomic development. Starting from the strategic objectives imposed by the European programmes at the environment-protection level, corroborated with the rather slow rhythm of reform of the Romanian mining industry determined by the delay concerning the achievement, i...

Romania’s joining the European Union implies its convergence with the economic European Space, both at a nominal and at a real space. The IMPACT programme stimulates the development of living research development projects and innovation through which directions of the Lisbon strategy of the European Union may contribute to improve the process of convergence and reduce regional disparities by absorbing structural funds devoted to research, technological development and innovation. The Valahia University of Targov...

There are two methods fixed and real-time assignment for improving the performance of transportation through truck- shovel system in open pit mines. The real-time assignment (RTA) method is a better manner for optimization process of transportation system in open pit mines, especially in the complex transportation systems. The most significant objective of the RTA method is, introducing a transportation system which cause to increasing production per time and decreasing cost per ton. In this study, a software base...

In current paper the purposes of an environmental assessment are described and the method, through which the “Impacting Factors” and “Environmental Components” are determined, is also outlined. Then, according to the definition, possible scenarios, and matrixes of weighting factors, the algorithm which shows the relation between Impacting Factors and Environmental Components is determined. Furthermore, the derivation of matrixes and the method of environmental assessment are described. In order to compare ...

In this paper a combined (hybrid) model of fix and flexible with its software were presented. In the model, initially the trucks assignment operation using the fix approach was done and in the end of trucks operation cycle in the flexible method, trucks dispatching method was started. Results of fix assignment method implementation in each transportation scheduling period were used in the mentioned software and finally the fitness and most suitable shovel and truck combined system for the real-time assignment was ...

In the course of years in the engineering practice are formed mathematical procedures which are marked as “engineering calculations”. We will characterize the engineering calculations with the following specific features: • the engineering calculations are pointedly pragmatic; • the engineering calculations are based on working formulas; • the results are approximate; • the engineering calculations are developed by experts and should be applied by experts.

Based on experimental data analysis and obtained by the author novel solutions on distribution of stress fields and deformations in rock mass enclosing mine workings it is shown that in the course of deformation rock mass undergoes successively discrete series of states that correspond to a definite ratio of physical-mechanical properties of rock mass and rock pressure level. It is determine that when an outline of mine working is deformed by 12-18\%, the latter bifurcates (looses its stability) that corresponds t...

The feasibility to substitute feldspar raw materials in a porcelain stoneware body with waste Cathode Ray Tube (CRT) glass was investigated. Various compositions, containing different percentages of feldspars and CRT glass, were compared. The densification process was studied by non-isothermal dilatometry and the degree of sintering was evaluated by pycnometric techniques. The structure and phase composition of the final ceramics were studied by SEM and XRD, respectively. The technological parameters and the mecha...

The system is intended for operatively planning and management of the quality of extracted ore in real time. The system includes following features: Creating and maintenance of data base which contains the numeral samplers of the detonated fields, the needed technical and technological indicators etc. Planning of the extracted activities for period, day, shift and part of a shift by different optimization measures. Distribution of the extraction between the coal-faces. Reverse connection with GPS information relat...

Global mapping is a international collaborative initiative through voluntary participation of national mapping organizations of the world, aiming to develop globally homogeneous geographic data set at the ground resolution of 1km, and to establish concrete partnership among governments, NGOs, private sectors, data providers and users to share information and knowledge for sound decision-making. The primary objective of Global Map project is to contribute to the sustainable development through the provision of base...

The paper presents definitions of nature risks and disasters. The mapping of the risk processes is discussed in the direction of educational purposes. International organizations publish information brochures about how to teach children correct behavior and preparation for natural disasters. Questions as “What do you do in case of an emergency” are discussed. Standards and technologies related to emergency management are considered. Some examples of maps and methods of mapping for young and older students are ...

Based on a two-level model for the zone of non-reversible deformations that is produced near mine working, bifurcation-type criterion is developed for stability of heterogeneous rock mass. A new approach to calculate parameters of mine working lining has been proposed. It is based on the treatment on energy balance of “lining-rock mass". Geomechanical criteria of mine working lining stability are obtained.

The problem is described with the concepts of the mathematical programming. The system UE can be valued with the execution of the participant’s goals – students, lecturers, state, contractors, parents and the rest of society. The optimization has to be done with the following limitations: • Capacity (the opportunity of the students to assistance) • Capacity (the opportunity of the lecturers to teach) • Financial means • Normative (rightful and administrative) boundaries The result – oriented function...

The main principles and methods of interactive education are discussed. The requirements to this approach of educational process are formulated. The differences between practical training and learning process are discussed. Based on these principles there are shown the examples for deductive education on processing stages in digital image processing and digital photogrammetry. Main attention is pointed to the initial data collection for purposes of inner orientation, image calibration and relative orientation of s...

Each of the spatial methods provides data in a different and a unique way for the three main geodetic directions: geometry of the Earth – coordinates of points and deformation; orientation and rotation of the Earth; gravity field as well as its variations. One of these methods, which is the most accurate and hopeful nowadays, is the Very Long Baseline Interferometry. In this paper it is gone into the technique of VLBI and its applications, mainly in geodesy and geodynamics. It is made an analysis of the motion o...

The first version of ASMIв„ў is created in the period 1975-1980. we offer the third version of ASMIв„ў entended for modern PC operation with Windfows and integrated with popular program systems, such as AutoCADВ®, ExcelВ® and WordВ®. In all three versions the creators are following the ideology of ASMIв„ў: 1. this is a specialized system directed mainly to markshader insurance of open mines; 2. the algorithms, big part of wich are original reflect the success of the markshader and geodetic science, technology and ...

The activities in mine factories are unthinkable without a process of earth mass transportation. The expenses for the transport and related to it additional works (repairs, road construction, etc.) reaches to 40-50\% from general expenses for production of one ton of useful minerals. For the adequate esteem of the efficiency of the motor transport the directions of the objects periodically have to decide the problem with its rational use. The real loading of the tip-lorries could be used as many indicator. This in...

The basic geodesic activities in the preparation of the Project “Reconstruction and Electrification of the Railway Line Plovdiv – Svilengrad – Greek/Turkish Border” have been described. The problems in the development of the working geodesic base, creation of a three-dimensional model, cadastral map, and the detailed structural layouts of the territory in question have been discussed. Specific attention has been paid to the procedures in changing the purpose of the agricultural and forestry territories and...

The optimization of the coal winning process using different mechanical and alternative cutting techniques using appropried mathematical models is an up to date reserch methodology. In the paper, two kind of such models are presented, first using deterministic analytical relations evaluated by numerical calculus, and the second using Monte-Carlo simulation of the process using experimentally obtained test data to generate random values of intrinsic rock parameters and logic diagram for the functional connections b...

In this work in terms of the ideas of the zone of inelastic deformations generated around stress concentrators in heterogeneous rock mass as a quasi-plastic block medium having a microstructure, rigorous criteria of rock mass stability are obtained that naturally take into account mining-geological and geomechanical conditions. Theoretical ideas added to the problems of underground structure stability permitted to provide an explanation for paradoxical, in the view of classical representations, numerous cases of m...

The North-Bohemian Basin area is known for its largest Czech brown coal deposit. About 50\% brown coal reserves have been exploited in the North-Bohemian Basin by the mining company of Severoceske doly, a.s. (North Bohemian Mines) today. The opencast mining of brown coal naturally led to vast landscape damages. Therefore reclamation work has acquired great significance. The specific feature of Severoceske doly, a.s. mining is the fact that the mining has been realized in two geologically absolutely different local...

Twelve of the numerous methodological problems are represented. They appear in the development of the automated systems for control of the mine works at open mines; if these problems are not reported the work of the system can be compromised partially of totally. Shortly those problems could be formulated as follows: 1.The mine is not considered like a system; 2.A management of the model; 3.Hierarchy of proposes and limitations; 4.The depot – a solution or a problem; 5.Attention: literally performance; 6.In prob...