Artykuły (CN-górnictwo)

Permanent URI for this collectionhttps://repo.agh.edu.pl/handle/AGH/102839

Artykuły czasopisma Górnictwo i Geoinżynieria

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Access status: Open Access ,
Iniekcyjne wzmacnianie górotworu podczas przebudów wyrobisk korytarzowych jako sposób zapobiegania obwałom skał i skutkom tych obwałów
(Wydawnictwa AGH, 2005) Rembielak, Tadeusz; Mielniczuk, Lech; Rosikowski, Janusz; Rusinek, Józef; Wala, Franciszek
The occurring mineral water in KWK »Piast« cause a corrosion of the excavations lining. Because of that it is necessary to rebuild these dog headings. In order to increase safety during rebuilding crossing of excavations there were applied forthcoming injectory firming of the rock mass in its surrounding, which prevents from occurring the fall of rocks and from the results of these fallings. In the paper there was presented an example of crossing rebuilding technology from a lining LP to the crossing of the POLYTRAB type in the Heintzmann Company in KWK »Piast«.
Access status: Open Access ,
Bezpieczeństwo pożarowe w tunelach
(Wydawnictwa AGH, 2005) Chojnacki, Krystian; Fabryczewska, Agnieszka
Nowadays tunnels and underground transports facilities are important means of communications, not only because of shorter journeys, but also increasingly out of consideration for the local population and the environment, as well as the local economy and industry. However fires in tunnels are a major hazard to human life and cause costly damage to the infrastructure. He limited escape facilities and the difficulties encountered the intervention forces in gaining access, call for extensive safety arrangements which must be complementary and mutually coordinated.
Access status: Open Access ,
Projektowanie parametrów wentylacji lutniowej w drążonych wyrobiskach podziemnych z wykorzystaniem programu komputerowego AGHWEN-3.0
(Wydawnictwa AGH, 2005) Szlązak, Nikodem; Obracaj, Dariusz; Szlązak, Łukasz
The principles of designing duct ventilation system and calculation of air distribution along underground headings fitted with leaky ductlines using AGHWEN-3.0 computer programme are presented in the paper. The algorithm of the calculation takes into consideration methane emission into a heading and both the air temperature and humidity distribution along a heading. It takes into consideration the cooperation between ventilation system, dust collection system and air cooling system. On the basis of a few examples the possibilities of AGHWEN-3.0 used in designing a ventilation system are presented.
Access status: Open Access ,
Modern technologies of heat production as an opportunity for coal
(Wydawnictwa AGH, 2005) Kurczabiński, Leon; Łój, Roman
Coal Holding Katowice produces best quality typical steam coal. For several years it has cooperated with manufacturers of modern coal boilers for whom it provides coal of appropriate granulation. This article presents a description of modern heat production technologies based on coal and designed for small and medium-size users. These technologies allow the cheapest heat production while the standing standards of toxic substances' emission are complied with. The article describes the directions of actions undertaken by Coal Holding Katowice to promote efficient and ecological high quality coal combustion technology, which give coal an opportunity to maintain its position in the market, as prices of other energy carriers are high.
Access status: Open Access ,
Norma PN-EN 2006-1 - nowy wymiar jakości betonu
(Wydawnictwa AGH, 2005) Kohutek, Zdzisław B.
Over one year ago in Poland the European Norm: PN-EN 206-1 was officially given priority in relation to previous national standards. Polish old regulation, which were hitherto obligatory, have been derogated. The European Standard for concrete, along with related documents specify so far known notions in the field of technics of concrete, also introducing many other definitions. The Standard arrange and classify both parameters of material itself, its properties and exposures of concrete related to environmental actions. It admits the substitution of part of cement (CEM I and CEM II/A) by fly ash and silica fume equivalent. The Standard in question render a modern workshop of the production control and conformity control accessible to producer. The objective of the European Norm is to guarantee durability of concrete construction and to ensure its other, desirable properties to investor or to user. Principal sections of the PN-EN 206-1 document have been discussed in this article. Those sections include: systematics of concrete and of its exposure applications, questions concerning selection of concrete components and of concrete composition, specification criteria, issue of delivery of fresh concrete and method of production evaluation and of material quality evaluation.
Access status: Open Access ,
Zastosowanie równania bilansu do wybranych zjawisk fizycznych zachodzących w wyrobiskach górniczych
(Wydawnictwa AGH, 2005) Mikołajczyk, Władysław; Filek, Krzysztof
In this article the general balance equation has been shown for analysing physical items. After having these physical items interpreted, it is possible to receive equation for such processes like: heat conduction, filtration or gas diffusion. Those processes take place in issues of mining ventilation, in that case there has been placed some examples of other calculations of processes which can appear in case of heading in a mine.
Access status: Open Access ,
Analiza stateczności ścianki szczelnej z zastosowaniem metody różnic skończonych
(Wydawnictwa AGH, 2005) Cała, Marek; Flisiak, Jerzy
This paper deals with designing and stability analysis of sheet pile walls (SPW). SPW are commonly used for stabilizing walls of trenches. Classical limit state methods are usually applied to design simple constructions. Application of simple design schemes may lead to several mistakes. According to Eurocode 7-1, numerical methods (NM) are among four main design methods of design. For to demonstrate possibilities of numerical methods application, several examples of SPW stability analysis were performed, utilizing Finite Difference Method code FLAC v. 5.0. Comparing NM with limit state methods, it must be underlined, that application of numerical methods has one serious limitation. NM may be used only to analyze initially designed construction. Straight use of NM as a design tool may be quite difficult, but not impossible. However NM suits perfectly for verification and correction of results obtained from limit state methods. Five different models of anchored SPW were considered. Several conclusions regarding number of anchors, bending moments distribution and global construction stability were formulated.
Access status: Open Access ,
Geotechniczne problemy utrzymania wyrobisk korytarzowych w złożonych warunkach geologiczno-górniczych
(Wydawnictwa AGH, 2005) Chudek, Mirosław; Duży, Stanisław
The output of useful minerals with underground methods causes the necessity of accomplishing and maintaining excavations in a defined time. These excavations often, when used, are liable to changeable influence of the rock strata mostly caused by the influence of mining works. It has a consequence in the conditions of selective mining exploitation which is an answer to market requisition. The paper presents problems in maintaining excavations localized in a rock strata characterized by i.e.: changing the geological structure along a shift of the analyzed excavations, complicated tectonical structure, complex layout of former exploitation etc., on the example of excavations from chosen collieries. The course of convergence of two roadways in the influence field of an active exploitation front.
Access status: Open Access ,
Wybrane problemy projektowe wymiarowania budowli podziemnych
(Wydawnictwa AGH, 2005) Ścigałło, Jacek; Florkiewicz, Antoni
The purpose of his paper is presentation of differences in static calculation and design of structures depending on design assumptions. As an example a multi-level subterranean car park in Poznań where the soil consisted of Pliocene clay is presented. Static calculations were performed for various soil parameters and selected load cases. These calculations showed a significant sensibility of design process of cavity walls to the adopted values of soil parameters. Taking into account the real values of cohesion c/u and the angle of internal friction phi/u - much higher than the values from codes, allowed for significant decrease of anchoring length of cavity walls in the soil. The influence of the soil parameters on the ultimate and serviceability limit states of the cavity wall itself was much smaller. It must be pointed out the several existing objects founded on this type of soil confirm the correctness of the suggested approach and existence of significant discrepancy between the real and code values of parameters for the Pliocene clay (Poznań clay).
Access status: Open Access ,
Złoża surowców mineralnych i zmiany środowiska naturalnego wywołane przez górnictwo na terenie Bukowna
(Wydawnictwa AGH, 2005) Wójcik, Andrzej J.; Chmura, Janusz
Complicated geological structure characterise the area of research. Big geological units in this region (Upper Silesian Coal Basin, Cracow Monocline) are separated by big and deep fault zone (Sławków Trough). Exploitation of natural resources existing in this area (zinc and lead ores, quaternary formations of sand) has led to enormous changes in the environment. As a result of restricting and finally closing down mining (zinc ores and sand mines) the area gradually regains its natural as well as tourist and recreational value. There are also a few places in the town especially distinguished to preserve them in unchanged form (i.e. Sztoła River Valley, Diabla Góra Hill).
Access status: Open Access ,
Zanieczyszczenie powietrza spalinami przy drążeniu wyrobisk z wykorzystaniem maszyn z silnikami Diesla
(Wydawnictwa AGH, 2005) Szlązak, Nikodem; Borowski, Marek
The ventilation methods of drifted headings where diesel-powered vehicles work were presented in the paper. The factors influencing exhaust emission are characterized and harmfulness of both exhaust components: particles and gases is discussed. In order to determine air pollution by diesel particles and gases of both particles and gases were taken. The results statistically analyzed. The ventilation conditions for preserving permissible diesel gases and particle concentration content.
Access status: Open Access ,
Strata control in underground tunnels - perspectives for development
(Wydawnictwa AGH, 2005) Majcherczyk, Tadeusz; Małkowski, Piotr
The paper constitutes a review of support systems of underground tunnels used in Polish coal mines. Taking the tendency to rationalise costs of tunnel drivage into consideration, new directions of strata control development are suggested, especially in terms of increasing spacing between support units and their reinforcement. The authors wrap up the discourse with their conclusions as well as share their experiences gained from monitoring interaction between support and rock mass.
Access status: Open Access ,
Energetyczne wskaźniki oceny procesu mielenia rudy miedzi i ich modelowanie
(Wydawnictwa AGH, 2005) Trybalski, Kazimierz; Krawczykowski, Damian
The paper concerns the energy consumption problem and copper ores grinding processes evaluation in grinding and classification system of one of KGHM »Polska Miedź« SA ore enrichment plants. The costs analysis of grinding and classification center was conducted, what identified its highest energy consumption. The energetic-technological factors evaluating grinding and classification processes were then proposed and calculated. On their basis the examples of models were constructed, which were regressive ones and neural networks forms, taking into consideration dependencies between process evaluation factors and energetic-technological data of investigated process. The comparison of given models was carried out.
Access status: Open Access ,
Iniekcyjne uszczelnianie i wzmacnianie górotworu przed czołem przekopu łączącego 1 drążonego przez strefę uskoku andaluzyjskiego w warunkach Zakładu Górniczego »Piekary«
(Wydawnictwa AGH, 2005) Rembielak, Tadeusz; Łaskawiec, Leszek; Majcher, Marek; Mielcarek, Zygmunt
In ZG »Piekary« there was a necessity to undertake a binding cross-cut 1 in the seam 506 through the Andaluzia Fall Zone in the range of the mining area »Brzeziny IV« and »Rozbark II«. In order to avoid several problems and to increase safety during undergoing the cross-cut through tectonically distributed zone, there was designed advancing by cementation, sealing and firming of a rock mass in front of its head, using injectory holes drilled by drills.
Access status: Open Access ,
Monitorowanie zmian naprężeń w żeliwnych tubingach metodą elastooptyczną
(Wydawnictwa AGH, 2005) Skopiak, Lech; Stachurski, Wacław; Maj, Maria; Piekło, Jarosław
In the article the problem of the measurement and determination of the stresses existing in the tubbing lining of the shaft was raised. The investigations were carried out in the P-III and P-V shafts conditions in O/ZG 'Polkowice-Sieroszowice' (KGHM Polska Miedź SA - KGHM Polish Copper in Lubin). Rock mass movements, created by deposit exploitation and dehydration of the water-bearing layers, result in occurring of high forces affecting the shaft lining, especially in picotage tubbing area. It, more often, results in cracking of those and in consequence of that fact causes the partial loss of the load capacity and leakproofness in the sensitive places of the shaft. In connection with that the frequent monitoring of stress changes in chosen picotage rings is necessary. This article presents the investigation method depending on numerical determination of dangerous areas of stress concentration as well as using the photo-elastic strain measurement to periodical observation of those.
Access status: Open Access ,
Numeryczna symulacja procesu wentylacji w wyrobiskach ślepych
(Wydawnictwa AGH, 2005) Branny, Marian
The study explores the potential of numerical modelling of airflow in blind headings. The main focus is forecasting the ventilation parameters in headings and galleries characteristic of copper mines belonging to the LGOM Corporation. The fundamentals of mathematical modelling of turbulent flows are provided. The model makes use of 3D continuity and Rynolds equations, the equation of turbulent transport of chemical components and the equations of the k-$\epsilon$ model (kinetic energy of turbulence, the rate of kinetic energy dissipation). The discretisation procedure involved the control volume method and the technique UPWIND. The developed numerical codes employ the hybrid schemes and power-law techniques. Nonlinear systems of discrete equations were solved with the use of SIMPLER procedures. 3D velocity fields and gas concentrations calculated for galleries are provided. The chief objective is to eliminate the hazardous conditions caused by the presence of gas pollutants emitted by diesel-powered engines in machines and produced in the course of blasting operations. The results of numerical solutions of steady-state velocity field and the time-space field of concentration of gaseous pollutant emitted by lumped or distributed gas sources are presented. The accuracy of numerical representation is evaluated by comparing the prognosticated values with measurements. The obtained physical fields by way of numerical procedures portray the real fields sufficiently well for practical purposes
Access status: Open Access ,
Koncepcja zrównoważonego rozwoju a budowanie wartości przedsiębiorstwa
(Wydawnictwa AGH, 2005) Kustra, Arkadiusz; Sierpińska, Maria
This paper presents a conception of sustainable development and ways of its reporting. An extra attention was paid to the possibility of using the sustainable development indicators for estimating the value of enterprise in one, single report, consisting of financial, economic, environmental and social measures. The attempt of relating financial aspects of activities together with sustainable development meets the conception of multi criteria assessment regarding the creation of value in both tangible and intangible fields of enterprise. It is a significant problem in mining enterprises which operate in specific conditions.
Access status: Open Access ,
Nośności odrzwi wybranych obudów łukowych
(Wydawnictwa AGH, 2005) Hałat, Włodzimierz
Numerical simulation based on 66 models allowed a bearing capacity of the steel arch support to be estimated. It has been shown some results of calculations for three types of profiles: V21, V25 and V29 and three sizes of the support: ŁP8, ŁP9 and ŁP10. Each of the support model was induced - besides of active loading - with four passive loadings modeling strata influence upon the support. It has been found that complete use of bearing capacity of the arch support depends not only on value of bearing capacity of the arch, what is connected with yield limit of steel, but it also equally depends on bearing capacity of joints of the arches.
Access status: Metadata only ,
Measuring of technological transport time consumption in quarrying using GPS technology
(Wydawnictwa AGH, 2005) Vaněk, Michal
An integral part of management is the rationalization of the existing processes. The presupposition for their successful realization is the knowledge of processes of interest, and namely including the times of single operations duration. The same it is also in the sphere of quarrying. For finding out of mining operations and their partial parts time durations the utilization of timing seems to be interesting. The contribution presents the time observation as the process whereby it is focused on one of mining operations, and namely technological transport. The gravity centre of the contribution can be seen in description of preparatory and realization phases of the time consumption observation.
Access status: Open Access ,
Problemy ochrony i udostępnianie podziemnych geostanowisk w kopalniach Górnośląskiego Zagłębia Węglowego
(Wydawnictwa AGH, 2005) Chmura, Janusz; Wójcik, Andrzej J.
Several hundred years long mining in the area of the Upper Silesian Coal Basin has left behind many historic sites, visualizing advances in mining technique. The passage of time and widespread commercialization impart negative effects on these valuable relics of the nature and the mining craft, both on the surface and underground. All kinds of activities directed at protecting valuable sites of old mining and making them available to the public are of considerable significance.