Browsing by Issue Date, starting with "2007"

Now showing 1 - 20 of 683

Access status: Open Access ,
Podstawowe różnice pomiędzy treścią istniejących dokumentacji glebowych a stanem faktycznym
(2007) Eckes, Teresa; Gołda, Tadeusz
W artykule porównano treści map glebowych ze stanem rzeczywistym, o którym wiedzy dostarczył opis 66 odkrywek glebowych. Przy doborze porównywanych elementów kierowano się możliwością szybkiego i łatwego ustalenia stanu danej cechy gleby, jak również jej rolą przy określaniu przydatności rolniczej gleby. Badaniami objęto miąższość poziomu próchnicznego, głębokość zwierciadła wody glebowo-gruntowej oraz gatunek gleby. Wyniki badań wskazują na znaczne różnice pomiędzy opisem gleby przedstawionym na mapach glebowych i w Komentarzu do tabeli klas gruntów..., a wynikami badań terenowych w zakresie badanych cech gleby. Wskazuje to na konieczność przeprowadzenia korekty sposobu opisu niektórych elementów gleby, w szczególności stosunków wodnych gleb i poziomu próchnicznego, oraz przeprowadzenia weryfikacji map glebowych.
Access status: Open Access ,
Sylikatowe żywice organiczno-mineralne w budownictwie podziemnym i tunelowym
(2007) Stachoń, Witold; Chmura, Janusz
Organic-mineral silicate resins are a specific group of the injection-media widely at present used in underground construction and tunnelling. Their common feature is the water environment has no influence on the course of the reaction. The distinction between them and the polyurethane resins (PUR) is they do not transfer the flame and belong to the group of self-extinguishing resins. Both the characterization and examples of the use of organic-mineral silicate resins have been given in the paper.
Access status: Open Access ,
Badania wpływu nowo opracowanych płuczek kationowo-skrobiowych na zmianę przepuszczalności ośrodka przy użyciu filtrów ceramicznych
(2007) Wysocki, Sławomir; Bielewicz, Danuta; Wysocka, Marta
In this paper results of investigations of new drill-in muds with cationic polymers are presented. Rheological properties and influence onto permeability of rocks were research. Investigations were moved in simulated downhole conditions. In tests dynamic HPHT filter press and ceramic filters (as a rock simulator) were used. Research shoved, that new cationic-starch drill-in muds couse smaller permeability damage than mud used in Polish industry.
Access status: Open Access ,
Przedsiębiorstwo Budowy Szybów - nietypowe zadania w budownictwie szybowym
(2007) Rusek, Janusz; Sanocki, Tomasz
In December 2003 Kopex SA concluded a Contract for main shaft deepening, construction and furnishing of support excavations at Cayeli Bakir Isletmeleri Zink and Copper Ore Mine in Turkey. From December 2003 till August 2007, PBSz SA carried out complete work in mining and mechanical branches, within the confines of a project consisting in opening-out a new production level. The scope of work included: deepening by 286 m an operating production shaft of 5.5 m diameter, construction and furnishing of shaft station room, skip pocket, conveyor drift, electric substation room and main pump room on the new production level, sinking of oblique ore passes and a ventilation raise, driving approx. 1000 m of stone headings with the application of shotcreted anchor support. During the shaft and ore pass sinking, the construction of support structures and driving of headings procedure employing the techniques of large diameter hole drilling and blasting were applied at a wide range. The procedure applied allowed the carrying out non-standard tasks in shaft construction.
Access status: Open Access ,
Analiza zawartości metali ciężkich w nawarstwieniach historycznych Krakowa i ich rola wskaźnikowa w badaniach archeologicznych
(2007) Wardas-Lasoń, Marta
Access status: Open Access ,
Ocena zawartości popiołu w pokładach węgla za pomocą nieparametrycznych metod statystycznych
(2007) Niedoba, Tomasz
The paper presents the distribution of ash contents in coal, treated as the mixture of distributions taken from the individual coal beds. In purpose of their approximation, apart from traditional log-norm distribution function, the non-parametric statistical methods were applied: kernel method and orthogonal Fourier series method. The best results of approximation were then mixed and the risk probability of evaluating the ash contents in the whole deposit was estimated.
Access status: Open Access ,
Problemy przemieszczania się wody złożowej w czasie eksploatacji złóż gazu ziemnego i podziemnych magazynów gazu
(2007) Rybicki, Czesław; Blicharski, Jacek
This paper concerns some problems of exploitation of water drive gas reservoirs. There are presented methods for defining drive mechanism of gas reservoirs and methods for estimation of intensity of water influx from adjacent aquifer. On the basis of presented mathematical model authors has made calculation for a chosen gas reservoir working in natural water influx conditions.
Access status: Open Access ,
Przykłady zależności pomiędzy dochodem a wydatkami na konsumpcję w przypadku losowości zmiennej niezależnej
(2007) Czapkiewicz, Anna
In this paper we consider two methods for estimating parameters in the linear model. First approach is the classical regression model where it is assumed that independent variable is deterministic. In the second one we assume that both independent as well as dependent variables are randomly distributed values related with each other by linear relationship and we build the model used for parameters' estimation. For model evaluation we made a comparison of two approaches using data from GUS.
Access status: Open Access ,
Modified single-zone model of radiation recuperator with microfinned surface
(2007) Karczewski, Krzysztof
Modified single-zone model of radiation recuperator with microfinned surface were elaborated. In this model the researches of heat transfer and hydraulic resistance microfinned elements were applied. To calculate the recuperator wall temperature weight mean temperature was used. By elaborated model radiation recuperator with microfinned surface to glass furnace were calculated. Single-zone model makes possible the project of small overall dimensions recuperators to industrial furnaces.
Access status: Restricted ,
Kombinatoryka dla programistów
(Wydawnictwa Naukowo-Techniczne, 2007) Lipski, Witold
Access status: Open Access ,
Techniczne i technologiczne aspekty zatłaczania wód złożowych do górotworu
(2007) Macuda, Jan; Lewkiewicz-Małysa, Aleksandra; Konopka, Elżbieta
Reservoir water injection to the rock mass through disposal wells should meet mining and environmental safety requirements. This problem is of special significance in the case of wells that are either abandoned wells or to be closed. The selection criteria for disposal wells and range of necessary tests and analyses of post-exploitation wells' construction designed for injection of reservoir water are presented in the paper. The results of laboratory analyses of reservoir water of known physicochemical properties were used for determining and eliminating original factors favorable to the colmatation of the near-well zone. KEYWORDS: reservoir waters, injection zones, water treatment, sedimentation, flocculation, colmatation, near-well zone.
Access status: Open Access ,
Przyrząd i metoda Kaczyńskiego do oznaczania współczynnika filtracji gruntów
(2007) Drożdżak, Ryszard
The theoretical assumptions and practical principles of the R. Kaczyński method of laboratory determining filtration coefficient of grounds are presented in the paper. The technical and geometric parameters of an experimental stand made at the Faculty of Drilling, Oil and Gas AGH-UST are discussed, and the results of measurements are presented.
Access status: Open Access ,
Stosunek podłoża do fliszu Karpat zewnętrznych pomiędzy Wadowicami a Babią Górą w świetle refleksyjnych badań sejsmicznych
(Wydawnictwa AGH, 2007) Pietsch, Kaja; Golonka, Jan; Marzec, Paweł
Interpreted seismic time sections in relation to available borehole data and extensive literature on geological structure of this part of the Carpathians, have served as the basis for developing geodynamic model of the Carpathian orogeny development in the area Wadowice - Babia Góra. Geological identification of seismic boundaries and their correlation on seismic sections were performed in the GeoGraphix system (Landmark Graphics Co.) Boundaries within the flysch and in the platform basement have been tied and correlated. Faults formed during the Hercynian Orogeny in the Carboniferous and the early Permian, strike-slip faults of N-S orientation, formed during the Alpine orogeny and normal faults of E-W orientation, which had formed during the last thrust of the Carpathians to their position have been identified.
Access status: Open Access ,
Możliwości redukcji emisji CO2 i jej wpływ na efektywność oraz koszty wytwarzania energii z węgla
(2007) Stańczyk, Krzysztof; Bieniecki, Marek
In the paper the analysis of the projects dealing with the main technological solutions of $CO_{2}$ capture and storage were done. The following systems were discussed: - system of capture and storage of $CO_{2}$ in post-combustion, - system of capture and storage of $CO_{2}$ in pre-combustion, - system of oxy-combustion, - and co-combustion of coal and biomass. In the analysis were discussed: - influence of the chosen technology of $CO_{2}$ abatement on costs and energy effectiveness of electricity production, - influence of emission trading on economy of the different options.
Access status: Open Access ,
Energia elektryczna z węgla brunatnego w świetle programów czystych technologii energetycznych i cen oraz kosztów wytwarzania w latach 1995-2006
(2007) Modrzejewski, Szymon
Directions of activities indicated by International Energy Agency and European Union in a range of perspective development scenarios of clean coal power technologies have been presented. Undertaken actions within this issue developed in Foresight program, including brown coal mining and processing technologies, have been outlined. Conceptions of hydrogen production from brown coal are especially important. Diverse growth of electricity price in particular countries of European Union in 2005-2006 has been outlined. Development of electricity production from brown coal, as well as its prices and costs in comparison with domestic prices for final consumers have been analysed. An unfavourable trend of enlargement of differences between domestic electricity price and recently stable price of electricity produced in brown coal fed power plants has been displayed. Annual growth of energy production since 2002 mainly in coal power plants has been displayed. Electricity consumption 3% growth caused by Gross Domestic Product 5,8% growth has been outlined. Presented conditions afford possibilities for a definition of development trends of brown coal industry.
Access status: Open Access ,
Eliminating water erosion within the system of land sanation measures
(Wydawnictwa AGH, 2007) Korelewski, Krzysztof
The paper defines the place of anti-erosional meliorations within the system land sanation (improvement) measures. It presents basic measures aimed at protecting soil against water erosion, taking into consideration the degree of their implementation urgency, and outlines the question of eliminating water erosion in spatial planning. Among anti-erosion measure, we can mainly enumerate activities of an agrotechnical and bioengineering character. From the technological perspective, these are primarily: anti-erosional crop rotation, anti-erosional field patterns, afforestation, biological and mechanical reinforcement of ravines and escarpments. Not only do they aim at restoring the imbalanced ecological systems (mainly agroecosystems) but they also intend to aptly shape physiographic elements (relief, soil, water regimes) as well as methods of land use, according to spatial planning regulations. Anti-erosional measures help in implementing the policies of sustainable development through land use rationalisation, taking into consideration the requirements of sozology.
Access status: Open Access ,
Problemy nośności stalowej obudowy odrzwiowej wyrobisk korytarzowych użytkowanych w długim okresie
(2007) Chudek, Mirosław; Duży, Stanisław; Dyduch, Grzegorz; Bączek, Arkadiusz
Over 90 percent of headings in collieries are made with steel support. This support is often under intensive, aggressive influence of mining conditions causing a slow decrease of construction load capacity. The paper presents results of in situ research of corrosion of steel support set ŁP, on the basis of headings steel supports set, used in a long period of time, reliability maintenance geomechanical and technical problems. On the basis of the results of the research, the characteristic features of the corrosion process and their influences of the construction load capacity are presented.
Access status: Open Access ,
Microwave beneficiation of brown coal
(2007) Zimmermann, Erik; Niemann-Delius, Christian
Coals of the Rhenish lignite mines, designated for power plant utilization, were exposed to microwave radiation energy for different time periods and energy levels, varying from 2,5 kW up to 10 kW, in order to dry the coal. The samples were treated with microwave radiation with a frequency of 2,45 GHz. A batch- as well as a continuous drying simulation and a verification with pre- dried samples (70 degrees of Celsius for 24 h), were conducted on a pilot scale level industrial microwave oven. To prove the general viability of microwave radiation as a beneficial process for brown coal, basic coal properties such as moisture content, volatile matter and gross calorific value were analyzed. Results show, that nearly no decomposition of the coal takes place, the moisture content can be reduced to a suitable level for pulverized coal firing power plants, the gross calorific value increases and double energy input leads to halved drying times. Furthermore the temperature of the brown coal did not exceed 90 degrees of Celsius during exposure to microwaves at ambient temperature and normal atmospheric pressure. The drying of the coal with microwave radiation showed in a first approach no negative side effects of the coal properties.
Access status: Open Access ,
Experimental study of vibration control in a two-degree-of-freedom pitch-plane model of a magnetorheological vehicle suspension
(Wydawnictwa AGH, 2007) Martynowicz, Paweł; Sapiński, Bogdan
The paper concerns the vibration control in a two-degree-of-freedom model of vehicle suspension equipped with independently controlled MR dampers in front and rear sections. The suspension model was tested in open-loop and feedback system configurations under harmonic and square base excitations. The experiments were conducted on the specially designed laboratory setup with data acquisition and control system configured in MATLAB/Simulink environment. The obtained results reveal effectiveness of MR dampers in vibration isolation for a wide range of excitation frequencies.
Access status: Restricted ,
Topologia ogólna
(Wydawnictwo Naukowe PWN, 2007) Engelking, Ryszard