CUPRINS Nr. 11-12 / 2006

EDITORIAL
Prezentarea activitatii didactice si de cercetare stiintifica a Catedrei de Masini si Instalatii de la Universitatea din Petrosani - Presentation of Didactic and Scientific Research Activity of The Machine and Installation Department from University of Petrosani
This article present didactic and scientific research activity of the Machine and Installation department from University of Petrosani.
Ilias N., Andras I., Gruneantu I., Radu S., Surulescu D., Ilias L.
Solutie tehnica avansata pentru cresterea performantelor complexelor mecanizate de abataj - Innovative Technical Solution for Increasing The Performance of The Full Mechanized Coal Faces
As the literature and the acquired experience shows, the output increase is driven by three design factors: panel length, face height and face width.
Kovacs I., Popescu F., Ridzi M-C., Zoller C., Burlan D.
Aspecte teoretice si experimentale privind determinarea parametrilor ce caracterizeaza taierea mecanica a carbunelui si rocilor sterile - Theoretical and Experimental Aspect Regarding The Determination of Parameters Characterizing The Mechanical Cutting of Coal and Waste Rock
The paper deals with some theoretical and experimental aspects regarding the determination of the mechanical cutting of non homogenous and anisotropic materials using excavator teeth , starting from research performed on samples of lignite and waste rock collected from many lignite open pits from the Oltenia coalfield.
Nan M. S., Andras I., Praporgescu G., Cristea D., Tomescu L.
Studiul comparativ al caracteristicilor la taiere a rocilor sterile din bazinul Olteniei - Comparative Study of The Cutting Characteristics of Overburden Rock from Main Open Pits of The Oltenia Coalfield
The paper deals with the main characteristics of the cutting of waste overburden rocks from some pits of Oltenia coalfield obtained on basis of laboratory research, parameters such as cutting force, specific cutting resistance, penetration forces, drag forces, a.s.o. acting on the teeth of bucket wheel excavators.
Kovacs I., Jula D., Mihailescu S., Tomus O. B., Cornaciu N.
Studiul comparativ al caracteristicilor la taiere a lignitului din principalele cariere ale bazinului Olteniei - Comparative Study of The Cutting Characteristics of Lignite from Main Open Pits of The Oltenia Coalfield
The performed analysis highlights the differences and common aspects of the lignite in different seams and pits among the Oltenia coalfield.
Andras I., Nan M-S., Jula D., Mihailescu S., Deaconu I.
Analiza caracteristicilor la taiere mecanica a lignitului si rocilor sterile excavate in carierele din Oltenia - Analysis of The Mechanical Cutting Characteristics of Lignite an Wate Rock from Main Open Pits of The Oltenia Coalfield
The paper highlights the possibility to estimate the forces acting on a tooth of bucket wheel excavator based on research performed in laboratory using the geometric similitude and physical modeling.
Gruneantu I., Cor P., Stanila S.
Consideratii tehnico-economice privind alegerea instalatiilor pentru perforat in minele de minereuri - Technical Economical Consideration Regarding The Selection of Drilling Jumbos for Metal Mines
In the paper are presented the main factors that influence the chosing of drillers and determine the effectivness of drilling process.
Ilias N., Draghici A., Vasilescu D.
Metoda neconventionala de evaluare a gradului de poluare a atmosferei prin utilizarea "integratorilor de securitate ecologica" - Unconventional Evaluation Method of polution Level of The Atmosphere with Utilization of "Ecological Security Intergators"
The implementation of the method with "Safety Integrators" provides information and data on health and safety at work assigned to the designed working system as well over the adoption of the decision to bring this system (or parts of it) under control, of the procedure for caring out the special safety audit.
Dumitrescu I., Ridzi M-C., Itu V., Praporgescu G., Dafinoiu M.
Stabilirea parametrilor geometrici ai dintilor de excavator pentru conditiile carierelor din Oltenia - Establishing The Geometrical Parameters of Teeth of Bucket Whel Excavators for The Conditions of Oltenia Coalfield Open Pits
The paper deals with some theoretical and experimental aspects related to the establishing of geometric parameters of teeth for the SRs 1300 bucket wheel excavator, starting from the results of laboratory research on the geometry of active part of the tooth on different samples of lignite and waste rock.
Florea C., Florea A., Dinescu S., Coman C.
Evolutia materialelor dure destinate sculelor miniere de taiere si perforare - Evolution of Hard Materials Devoted to Mining Cutting and Drilling Tools
The concerns to carry out of some materials with two antagonism properties, respective hardness and tenacity for to improve the performances of cutting and drilling mining tools depend on powders technology which permit also modification of properties even during of processing.
Gaf-Deac I., Ilias L., Gaf-Deac M.
Analiza multicriteriala la utilizarea rationala a resurselor naturale - Multicriterial Analysis of Rational Use of Natural Resources
In order to highlight the economic efficiency of the exploitation and valorization of natural resources, takig into account the large diversity of the natural factors, it is stated that the multicriterial analysis represents the optimal way to quntify the elements for decision making.
Popescu F., Magyari A.
Posibilitati de control al variatiei capacitatii de transport cu banda - Possibilities for The Control of Transportation Capacity Variation of Belt Conveyer
The present study wants to solve the problem by using some unconventional methods, in order to assure reliability, precision, as well as the possibility of integrating it into the mining monitoring system.
Andras A., Andras I.
Tehnologia realitatii virtuale un instrument modern in proiectarea echipamentelor pentru industria extractiva - Virtual Reality Technology-an up to date Tool in The Design and Development of Mineral Resorces Related Equipment
The paper deals with the application of this technology in the mining equipment design and development.
Itu V., Dumitrescu I., Kovacs I., Nan M. S.
Determinarea tensiunilor mecanice si a deplasarilor din structura turnului instalatiei de extractie "Put Vest" E.M. Uricani - Determination of Mechanical Strains and Displacement from The Structure of The Extracting Installation "Put Vest" E.M. Uricani
In the paper there is presented the strain and displacement state from the construction of the extraction tower at the moment of the study as a response of the structure to the permanent and exceptional loads from the functioning of the extracting installation.
Koronka F., Andras A.
Implementarea principiilor mecatronicii in proiectarea echipamentelor pentru industria extractiva - Implementing The Principles of Mechatronics in Mining Equipment Design and Development
The constructive complexity, typological variety and the operating environment aggressiveness lead to a sinuous and conjectural evolution of the equipment for mineral industry.
Vatavu S.
Particularitati constructive, functionale si de calcul ale supapelor de presiune din componenta actionarilor hidraulice ale masinilor miniere - Constructive, Operating and Calculation Particularities of The Pressure Valves Used in The Hydraulic Driving of Mining Machines
Taking into account the importance, the destination, the classification and the particular features of the pressure valves used in the hydraulic driving of the mine machinery, the paperwork analyzes the characteristics and the constructive-operating particularities of these hydraulic elements' closing devices.
Petrilean D. C.
Probleme teoretice si practice ale consumului de energie electrica la o instalatie de comprimare a aerului - Theoretical and Practical Aspects of Energy Consumption of Helical Screw Compressor
The energy consumtion of helical screw compressor in general use, their metodology of calculus, their typical features and range of consumtion capabilities are then discussed in some detail.