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Renata Patyńska

emission system, calculation of emissions for the last year using the indications of the OECD/IPCC methodology and given methodologies of current information updating, National Fund of Environmental Protection, Warsaw, 1994, (nonpublished). [4] GAWLIK L., GRZYBEK I., Methodology of estimation of methane emissions connected with coal exploitation in Poland, Mineral Raw Materials Management, Vol. II, Booklet 3, 1995. [5] GAWLIK L., GRZYBEK I., Investigation results and recommendations for uncertainty reduction and clarity improvement of

Open access

Marek Wyjadłowski

Abstract

The constant development of geotechnical technologies imposes the necessity of monitoring techniques to provide a proper quality and the safe execution of geotechnical works. Several monitoring methods enable the preliminary design of work process and current control of hydrotechnical works (pile driving, sheet piling, ground improvement methods). Wave parameter measurements and/or continuous histogram recording of shocks and vibrations and its dynamic impact on engineering structures in the close vicinity of the building site enable the modification of the technology parameters, such as vibrator frequency or hammer drop height. Many examples of practical applications have already been published and provide a basis for the formulation of guidelines, for work on the following sites. In the current work the author’s experience gained during sheet piling works for the reconstruction of City Channel in Wrocław (Poland) was presented. The examples chosen describe ways of proceedings in the case of new and old residential buildings where the concrete or masonry walls were exposed to vibrations and in the case of the hydrotechnical structures (sluices, bridges).

Open access

M. Bartlewska-Urban and T. Strzelecki

1 Introduction There is still a growing increase in interest in the use of mathematical models in geotechnical design. Most commonly, these models are developed based on finite element method (FEM). A successful simulation requires a careful model construction. A very important part of constructing the model is the calibration of model parameters. The aim of this paper is to present a methodology of automatic soil model calibration employing inverse analysis, namely genetic algorithms (GA). Inverse problem requires that mathematical model is closely

Open access

Magdalena Rajczakowska, Damian Stefaniuk and Dariusz Łydżba

tomography: methodology and applications, Boca Raton: CRC Press, 2009. [14] EPSTEIN C.L., Introduction to mathematics of medical imaging, SIAM, Philadelphia, 2003. [15] DOERNER M.F., NIX W.D., A method for interpreting the data from depth-sensing indentation instruments, Journal of Material Research, 1986, Vol. 1(4), 601-609. [16] OLIVER W.C., PHARR G.M., An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments, Journal of Material Research, 1992, Vol. 7

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Lamri Dahoua and Fakhridine Boymatov

period 27 . It is also known that the endurance coefficient is significantly affected by the coefficient of asymmetry of the cycle referred to as ρ. Therefore, samples of wooden beams with the dowel plates were tested with asymmetry coefficient characteristic during the real operational mode. Basically, endurance tests were conducted without stopping the vibrator, in order to exclude the possible effect of the “rest mode” on endurance 26 . 3 Methodology For wooden building structures with suspended crane equipment, crane girders, span structures of conveyor

Open access

Tadeusz Majcherczyk, Zbigniew Niedbalski and Łukasz Bednarek

. Nevertheless, these factors do not equally affect the changes occurring in the excavation and its surroundings. Hence, three criteria are proposed for the prediction of loading and deformation of the support scheme of excavations situated at large depths (cf. Table 2 ). Table 2 Parameters used in the proposed methodology [ 19 ], Parameters Comments H k r = R e   p e n 2 ∗ γ $${{H}_{kr}}=\frac{{{R}_{e\,pen}}}{2*\gamma }$$ H – depth of excavation site, m; kr H – critical depth, m; R c pen

Open access

Łukasz Herezy, Dariusz Janik and Krzysztof Skrzypkowski

selection of the methodology. On the basis of the results of analyses and their interpretations, the load cycle analysis can now be used in real-life applications, to improve the work safety in mines. Researchers from the Department of Underground Mining AGH-UST investigating interactions between longwall roof-powered support and roof strata assumed that the longwall system with the dedicated software is to be treated as a research tool. Data collected from the longwall system are used in the development of new methods to enhance the monitoring of the rock strata

Open access

Marek Grodzicki and Marek Rotkegel

of the frame section of approximately 20 m 2 . Figure 4 The proposed outline of the frame of approximately 20 m 2 . 4 Numerical analysis A comparison of the frames currently used with the proposed frames was carried out with the scope of their resistance parameters and work in the conditions of loads occurring in the Soma basin mines. The strength analysis of the frame was carried out using the finite element method [ 7 , 9 ], using the COSMOS/M program [ 10 ], with the methodology developed and used in GIG. The essence of FEM is the

Open access

Janina Zaczek-Peplinska and Katarzyna Osińska-Skotak

parameters (Leica C10 – 532 nm (green) laser, pulsing, Z+F 5006h – infrared laser, phasing and thermal images of the object). Proposed methodology of survey data handling was used for Ecker Dam concrete surface condition assessment in 2013–2014. That article presents the results of surveys and analysis performed for Ecker Dam during the first control period. The part of the recommendation had been implemented in 2015–2016. 2 Object The test object is concrete-gravity water dam Ecker Dam ( figure 1 ), located in the Harz Mountains (Germany). The concrete dam on

Open access

L. Florkowska

Abstract

Issues presented in this work relate to geotechnical problems that are specific to the mining areas. The paper discusses the methodology of mathematical and numerical modeling of these problems. Examples contained in the paper include: predicting the influence of mining exploitation on a detached building and evaluating the effectiveness of the building protection with the trench. Possible applications of numerical modeling as a tool to aid the continuous monitoring of the building state during the exploitation have also been discussed