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GÓRNICTWO I GEOINŻYNIERIA

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Kwartalnik wydawany przez Uczelniane Wydawnictwa Naukowo-Dydaktyczne Akademii Górniczo-Hutniczej w Krakowie od 1977 r. (do połowy 2003 r. wydawany był jako Zeszyt Naukowy Górnictwo).

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Now showing 1 - 10 of 964
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Metoda planowania i kontrolowania realizacji przedsięwzięć budowlanych: studium przypadku
    (Wydawnictwa AGH, 2011) Czarnigowska, Agata; Sobotka, Anna
    It is quite common that in the course of construction works their programmes (both schedules and cost plans) have to be adjusted to changing conditions. If plans are to be met, it is thus necessary to monitor performance to introduce necessary repair actions. Progress checks providing information useful in project control should be conducted on regular basis. The aim of the paper is to present a method used for managing projects on operations level- the Earned Value method (EV) and its extension - Earned Schedule (ES). In these methods, a set of simple indices allow the project manager to decide on further progress of works. Application of the method has been illustrated by a road works case study.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analiza pola prędkości w wyrobiskach przewietrzanych przez dyfuzję
    (Wydawnictwa AGH, 2010) Branny, Marian; Filipek, Wiktor; Karch, Michał
    Ventilation of short blind heading caused by through road air velocity is considered. A series of numerical tests was performed to determine the effect of different through air velocities on airflow patterns. The velocities ranged between 0,65 m/s and 2,1 m/s. 3D velocity fields was calculated using a finite-volume CFD computer code FLUENT 6.1. Two turbulence models (standard k- and RNG k-) as well as two near-wall models (wall function and enhanced wall treating) were tested. Numerical results were compared with experimental data.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Uwarunkowania geologiczno-inżynierskie wznowienia budowy Elektrowni Szczytowo-Pompowej »MŁOTY« koło Bystrzycy Kłodzkiej
    (2008) Kowalski, Edward; Rotkegel, Marek; Stałęga, Stanisław
    Underground mining operations of the construction of Pumped-Storage Power Station »Młoty« were launched in 70's of the 20th century. About 2 km of underground excavation was done than, including partially accomplishment of 3 pressure adits, opening adit, main adit and passby adit. Now, after over 30 years of freezing, a construction resuming is considered. Authors of this paper have done the necessary investigations of the technical state of excavation and characterise the geological and mining conditions of freezing or resuming the construction of power station »Młoty«.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Modelowanie wpływu zaburzeń tektonicznych na drgania stropu w górotworze uwarstwionym
    (Wydawnictwa AGH, 2008) Walaszczyk, Jan; Wiewiórka, Dariusz
    Phenomenon of dynamic relieving present in paper and methodic of numerical modeling this problem. Numerical model of group of room present in interaction area of big fault. Diagrams in result of account received displacement, velocities and acceleration in chosen points of models. It implement analysis about diagrams of changes of tensions in pillars and enclosing of them. Numeric errors in digital filtration of result use eliminating.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Wykorzystanie narzędzi GIS do analizy hydrogeologicznej w obszarze byłych kopalń w Wałbrzychu
    (Wydawnictwa AGH, 2008) Strzelecki, Michał
    The paper contains the description of the Geographic Information System used for hydrogeology analyses in the area of mines in Wałbrzych. Modern GIS tools has been used to create The Digital Terrain and Geology Model. This model is able to generated: profiles, contour maps, perspective views and was possible to calculate designed surfaces, generate cross section and others analyses.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Grawimetryczne badania dynamiki rejonu wysadu solnego »Dębina«
    (Wydawnictwa AGH, 2008) Łój, Monika
    This paper presents results from two geodynamic profiles, located of the »Dębina« salt dome in Bełchatów. »Dębina« salt dome separates Bełchatów deposit from Szczerców deposit. Currently, the exploitation on the Bełchatów field approaches the slat dome limits and at the same time the construction of the new Szczerców strip mine has been started, which influences the dynamics of the phenomena occurring in the salt dome. The idea behind this research project is to attempt to quantitatively interpret the results received from the gravimetric investigations i.e. to link temporal gravity changes with processes on »Dębina« salt dome.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analiza odległości i czasu między wstrząsami ze strzelań torpedujących a samoistnymi o energii rzędu E4 J w warunkach KW SA KWK »Piast«
    (Wydawnictwa AGH, 2008) Rusinek, Józef; Kurnik, Stanisław
    In the years 2002-2006 there were carried out the mining operations at the areas V, VII, VIII, XV and XVII, which were a reason of rock-mass tremors and 1532 rock-mass tremors with the seismic energy of the order 10/4 J occurred. In the analysed period 751 torpedo blastings were carried out and 598 tremors were registered as a result of torpedo blasting. After joining the database of rock-mass tremors with the seismic energy of the order 10/4 J and tremors of torpedo blasting which link to the same area of the mine, there were obtained 311 tremors of torpedo blasting and 1118 rock-mass tremors with the seismic energy of the order 10/4 J. Inter-correlation between tremors concerns a distance from a hypocenter of the tremor of torpedo blasting to a hypocenter of the rock-mass tremor with the seismic energy of the order 10/4 J and a distance from a place of detonation of explosive charge (a foot of a blasthole) to a hypocenter of the rock-mass tremor with the seismic energy of the order 10/4 J. The time period between tremors of torpedo blasting and rock-mass tremors with the seismic energy of the order 10/4 J was also a subject of the analysis.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Określenie niszczącej strefy wpływów dla zjawisk sejsmicznych
    (Wydawnictwa AGH, 2008) Drzewiecki, Jan
    The article describes a method to calculate the range of a destructive influence area for seismic events, that is the area where destruction of working may occur. The basis for calculation of this range was the analysis of selected parameters of documented tremors which had taken place between 1990 and 2006. In the calculations a method of forecasting of seismic energy dependent on the intensity of exploitation with focus of tremors located in the front of coalface. Calculations were made for zones which size assumes probability of 20%, 50% and 80% of working destruction. Also an example of calculations for exploitation of a coal seam 750 meters below ground has been given.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Wpływ wietrzenia i deformacji górniczych na zmiany podstawowych parametrów geotechnicznych odpadów powęglowych wbudowanych w obwałowanie rzeki Kłodnicy
    (Wydawnictwa AGH, 2008) Michalski, Piotr; Kozielska-Sroka, Ewa
    Results of tests carried out on the embankment of the Kłodnica river, erected from the colliery spoils from »Sośnica« mine, were presented in the paper. Determination of the influence of natural weathering and mining subsidences on changes of the basic geotechnical parameters was the subject of the investigation. The grain size distribution, bulk density and moisture content of the material were determined after 4 and 16 years of the embankment life time at the depths in the range of 0-1,15 m below the embankment crest. The strong influence of the weathering on changes of the granulation was stated, particularly visible in decrease of cobbles fraction content and considerable increase of silt and clay fractions content. However, the influence of weathering disappeared at the depth of 1 m. The granulation changes caused the changes of shearing strength parameters and permeability coefficient. The significant influence of the creeping of the earth surface resulted from moving the trough edge of mining subsidences on the loosening of the embankment body up to the embankment crest was stated. The loosening of the material caused decrease of the angle of internal friction and increase of permeability coefficient.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zmienna uszkodzenia D dla skał poddanych próbom jednoosiowego rozciągania
    (Wydawnictwa AGH, 2008) Tomiczek, Krzysztof
    On basis of Lemaitre and Ju and Xie theories a new damage variables D are proposed to measure the damage and evolution of failure of rocks under uniaxial tension. The damage D was determined by load and unload stress - strain characteristics of cylindrical sandstones and granite samples under direct tension condition. Generally, the damage D of rocks under tension was lower than critical value (D< 1), when the load amplitude reached ultimate strength. The results illustrated also that the tangent modulus E, has determinative influence of D.