Publikační činnost Zkušebních laboratoří výzkumného centra hornin / Publications of Testing Laboratories of the Rock Research Centre (549)

Permanent URI for this collectionhttp://hdl.handle.net/10084/67068

Kolekce obsahuje bibliografické záznamy publikační činnosti (článků) akademických pracovníků Zkušebních laboratoří výzkumného centra hornin (549) v časopisech registrovaných ve Web of Science od roku 2003 do roku 2012. Útvar byl zrušen.
Do kolekce jsou zařazeny:
a) publikace, u nichž je v originálních dokumentech jako působiště autora (adresa) uvedena Vysoká škola báňská-Technická univerzita Ostrava (VŠB-TUO),
b) publikace, u nichž v originálních dokumentech není v adrese VŠB-TUO uvedena, ale autoři prokazatelně v době jejich zpracování a uveřejnění působili na VŠB-TUO.

Bibliografické záznamy byly původně vytvořeny v kolekci Publikační činnost akademických pracovníků VŠB-TUO, která sleduje publikování akademických pracovníků od roku 1990.

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Now showing 1 - 5 out of 5 results

Determination of chlorite, muscovite, albite and quartz in claystones and clay shales by infrared spectroscopy and partial least-squares regression
(Akademie věd České republiky, Ústav struktury a mechaniky hornin, 2012) Ritz, Michal; Vaculíková, Lenka; Plevová, Eva; Matýsek, Dalibor; Mališ, Jiří
The objective of this work is the chemometric quantification of minerals in rocks. A chemometric method was developed for the determination of chlorite, muscovite, albite and quartz in claystones and clay shales using infrared spectroscopy. Bromide pellets and diffuse reflectance were used to measure the infrared spectra; principal component analysis and partial leastsquares regression were used as chemometric methods. Spectral regions (4000-3000 cm-1 and 1300-400 cm-1) containing important spectral information were chosen by principal component analysis. The calibration models were created by a partial least-squares regression. The mean relative error and relative standard deviation were calculated for the assessment of accuracy and reproducibility. The value of the mean relative error was about 10 % for most of the calibration models. The value of the relative standard deviation ranged from 1.1 to 3.0 % for most calibration models based on diffuse reflectance spectra and from 4.0 to 9.2 % for most calibration models based on spectra obtained with bromide pellets.
Thermal study of sandstones from different Czech localities
(Springer, 2011) Plevová, Eva; Vaculíková, Lenka; Kožušníková, Alena; Daněk, Tomáš; Pleva, M.; Ritz, Michal; Simha Martynková, Gražyna
Thermal analysis is a useful tool for determination of the rock‘s thermal behavior. The thermal behavior of the rock is affected by both its composition and structure. This study presents the application of thermogravimetric, differential thermal, and thermomechanical analyses for the characterization of the selected Czech sandstone samples. The detailed study of mineralogical composition was carried out by FTIR spectroscopy, X-ray diffraction, and optical microscopy. Thermal expansion during heating up to 1,000 °C, together with the coefficient of thermal expansion showed almost the same values for all the studied sandstone samples. Nevertheless, the residual thermal expansion varied depending mainly on the composition. In the case of higher content of quartz, the thermal expansion showed higher values. With increase of carbonate, glauconite, or clay mineral volume, the residual thermal expansion decreased. Factors such as grain size or shape of particles did not significantly influence the observed thermal expansion values.
Colour measurement as a proxy method for estimation of changes in phase and chemical composition of fly ash formed by combustion of coal
(Elsevier, 2009) Raclavská, Helena; Raclavský, Konstantin; Matýsek, Dalibor
Influence of technology on colour changes of fly ashes was studied in relationships with their chemical and phase composition. Dry bottom boilers at the Detmarovice Power Plant (the Czech Republic) were selected for this study. Combustion tests were performed using mixture of coal and mineral oil residues at the minimum and maximum output of the power plant. Fly ashes for chemical analysis, phase analysis and colour measurements were sampled from the four sections of electrostatic fly ash precipitator. Colour parameters indicate relationships with concentrations of elements which are preferentially bound in silicate matrix. The maximum output of power plant increases the concentration of glass which has decisive influence on values of colour parameters. The changes of colour parameters can indicate the conditions of the technological process. Relationships between colour and constituents of the fly ash are expressed by CIE Lab colour parameters.
Fatigue and dynamic energy behaviour of rock subjected to cyclical loading
(Elsevier, 2009) Bagde, Manoj Namdeo; Petroš, Vladimír
Some parameters of rockbursts derived from underground seismological measurements
(Elsevier, 2008) Holub, Karel; Petroš, Vladimír
A total of 240 three-component recordings from 80 rockbursts, which occurred in various coal mines in the Ostrava-Karviná Coal Basin (Czech Republic) between 1993 and 2005, was used to examine the decrease in maximum particle velocities ui (m/s) with a scaled distance of d = d/√E (m/√J) or d/3√E (m/3√J) and the rate of predominant frequencies of body waves. The energetic span of rockbursts was within the interval of E = 6.2 × 103 − 5.0 × 108 J, while calculated hypocentral distances d of four underground seismic stations varied from 0.6 to 7 km. The slopes b of regression straight lines for the maximum particle velocities ui (m/s) of P- and S-waves in the bilogarithmic scale correspond to the values of − 1.004, − 1.297, − 1.183 and − 1.527. The results of the linear regression are as follows: Pmax-waves ui = 1.184 × 10− 4 × d− 1.004 (m/s) (square root scaling) Pmax-waves ui = 3.055 × 10− 3 × d− 1.297 (m/s) (cube root scaling) Smax-waves ui = 5.280 × 10− 4 × d− 1.183 (m/s) (square root scaling) Smax-waves ui = 2.397 × 10− 2 × d− 1.527 (m/s) (cube root scaling). The evaluation of the abovementioned dynamic parameters was based on seismic events data gathered in the database of the regional seismic array, and calculations were carried out either by using special programs applied as part of the automated data processing in the computation center, or by usual linear regression approaches. The aim of the detailed analysis of the maximum particle velocity and predominant frequencies was a) to set up input data from underground seismological observations for laboratory experiments dealing with the comparison of rock mass behaviour under modeled laboratory conditions simulating manifestation of rockbursts, and b) to incorporate particle velocity into the design of support in order to control damage and evident devastation of workings by rockbursts. The investigation of peak particle velocities was based on the recognition that they are the best criterion to assess vibration damage to surface structures and in mines.

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