Brown Coal Research Institute

Most, Czech Republic

Brown Coal Research Institute

Most, Czech Republic
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Burda J.,Brown Coal Research Institute | Vesely M.,Brown Coal Research Institute | Rehor M.,Brown Coal Research Institute | Vilimek V.,Charles University
Landslides | Year: 2017

The aims of this study were to summarize current knowledge of a large runout prehistoric landslide, critically review all of the existing data and, in particular, gather new data in order to estimate the age of the accumulation and reveal the movement mechanism. The reconstruction of a large rockslide-rock avalanche in the NW part of the Czech Republic was supported by the analysis and interpretation of 216 boreholes and by GIS analysis of the original 1950s pre-mining surface using digitized old military topographic maps. For the age estimation, we used the Schmidt hammer test. The total volume of the quaternary deposit was calculated to be between 25.4 and 27.4 mil m3, occupying an area of 778,000 m2 and consisting of six to eight generations of colluvial sediments. Three main landslide events were identified based on extensive Schmidt hammer sampling, and the approximate age was established using a regression equation assembled by Engel (2007). All three of the documented events occurred around the time of significant climate change. The oldest event occurred due to the Oldest Dryas warming, the largest event probably occurred at the end of the Younger Dryas (11,700 yBP), and the youngest of the documented events was purely of a Holocene age, with the highest landslide frequency being during the Atlantic temperature fluctuations (approximately 8200 yBP). The slope deformation occurred on a fault slope with a relative height of over 400 m and in tectonically weakened rocks. Sediments in the Most Basin were weakened from meltwater during rapid warming periods, which allowed mobilization of rockslide deposits and runout of up to 1000 m from the mountain foothills. © 2017 Springer-Verlag GmbH Germany

Burda J.,Brown Coal Research Institute | Burda J.,Charles University | Zizka L.,Brown Coal Research Institute | Dohnal J.,Charles University
Natural Hazards and Earth System Science | Year: 2011

Recent mass movements currently comprise one of the main morphogenetic processes in the extensive anthropogenic relief of the foreground of the Krušné Hory Mountains in the Czech Republic. These mass movements result in several types of deep-seated slope failures, depending on the type of movement and the water saturation of the landslide material. This paper presents the results of a detailed geomorphic survey and orthophotograph analysis combined with geodetic monitoring data in an area affected by open-pit coal mining. An interdisciplinary approach has enabled an in-depth review of both the dynamics and development of recent slope failures. The article describes deep-seated landslide complex in this part of the foothills of the Krušné Hory Mountains. At the study site, mass movements occur in thick colluvial mantle and weathered Tertiary claystones. The main factors influencing their development include rainfall culminations, groundwater flowing from the valley of Šramnický Brook and former slope failures. All of the slope failures that have occurred here have originated at former slope failure sites. © Author(s) 2011.

Moni V.,Brown Coal Research Institute | Helebrant F.,VSB - Technical University of Ostrava | Schmidt P.,Brown Coal Research Institute
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2013

Series of long time complex measurements on running technologies for raw material mining and processing was carried out simultaneously to the measurements on a model belt conveyor. The study was made in the frame of the MPO project No. FR-TI1/537"Complex diagnostic system for belt conveyors" since 2009 to 2012. The article shows a comparison by measurement on the long distance belt conveyor using a verified contactless thermal imaging equipment and a brand new device MICROLOG CMXA80 with an "Idler Sound Monitor"programme module. © SGEM2013 All Rights Reserved by the International Multidisciplinary Scientific GeoConference SGEM.

Safarova M.,Brown Coal Research Institute | Kusy J.,Brown Coal Research Institute | Andel L.,Brown Coal Research Institute
Journal of Analytical and Applied Pyrolysis | Year: 2010

The paper deals with the outcomes of laboratory experiments concerning brown coal tar hydrotreatment, in which tar was a by-product of brown coal pyrolysis. The experiments were carried out in pressure reactor at 300 °C and at varied operational pressures of hydrogen used as hydrotreatment medium. The brown coal tar samples earmarked for the hydrotreatment tests had been prepared through pyrolysis of samples of brown coal, in which samples represented, in terms of qualitative parameters, the brown coal types to be found in individual districts of the North Bohemian Coal Basin. During the experiments the qualitative parameters were determined both of the feed material (brown coal tar) and of the products generated (gaseous, water and organic phases and the hydrotreatment residue). The yields of these products as per on the operational hydrogen pressure used during the hydrotreatment process were also determined. © 2010 Elsevier B.V. All rights reserved.

Moni V.,Brown Coal Research Institute | Klouda P.,Brown Coal Research Institute | Skraban V.,Brown Coal Research Institute
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2013

Complex measurements of characteristic parameters realised on a long distance model belt conveyor are described. The main objective was to complete and combine the regular measurements of electric power on drives of belt conveyors operated in Czech opencast mines with measurements of other physical quantities and to gain by this way an image of their mutual relations and relations of quantities derived from them. The paper includes a short description and results of the measurements on an experimental model conveyor with a closed material transport way. © SGEM2013 All Rights Reserved by the International Multidisciplinary Scientific GeoConference SGEM.

Rehor M.,Brown Coal Research Institute
11th International Multidisciplinary Scientific Geoconference and EXPO - Modern Management of Mine Producing, Geology and Environmental Protection, SGEM 2011 | Year: 2011

The main topic of the article is mineralogical research in the North Bohemian Brown Coal Basin. This work summarises new knowledge for the 2002 - 2009 period, five new minerals were identified in the basin in the interval: anorthite, esseneite, ferrierite, melilite, and srebrodolskite. The second object of the article is the situation of important localities of the Krušné Hory Mountains. Main attention is devoted to a newly discovered amethyst locality Černý Potok. © SGEM2011 All Rights Reserved by the International Multidisciplinary Scientific GeoConference SGEM.

Brejcha J.,Brown Coal Research Institute
12th International Multidisciplinary Scientific GeoConference and EXPO - Modern Management of Mine Producing, Geology and Environmental Protection, SGEM 2012 | Year: 2012

Development of procedures assessing the impact of hydrological reclamation of open mines on microclimate, water and soil ecosystems and air quality is the aim of the project. Unique opportunity of an ongoing hydrological reclamation of the open residual pit of the Most mine which significantly exceeds the reclamations being made in the Czech Republic, has been being utilized. The project started in 2011 and is scheduled for 4 years. Significance of air quality changes near a lake caused by microclimate changes of the area of interest is evaluated in a partial project which deals with air quality. Measurement is carried out in two zones and one reference point. Near vicinity of the lake is the first zone where 8 monitoring stations are situated ca 50 - 100 m from the lake bank. Further surroundings are the second zone where 3 monitoring stations are situated ca 50 - 100 m from the lake bank. The reference point is 20 km distant from the locality. The concentrations of characteristic pollutants for this industrial locality are observed - SO2, NOx, O3, BTX, VOC, H2S, NH3, dust fallout. Samples are taken in a passive way. BTX, VOC and dust fallout sample taking period is 30 days and that of the others is 14 days. Radiello sample taking system is used. In addition to former pollutants a PM10 aerosol particle concentration is continually measured in the second zone and the reference point as well FH62IR beta dust meters are use for these determinations. Partial evaluation of a measurement carried out so far shows a seasonal dependency of results and a dependency of concentration field spatial distribution on monitoring station location and on its distance from significant potential pollutant sources. © SGEM2012 All Rights Reserved by the International Multidisciplinary Scientific GeoConference SGEM.

Hendrychova M.,Czech University of Life Sciences | Salek M.,Czech University of Life Sciences | Tajovsky K.,Academy of Sciences of the Czech Republic | Rehor M.,Brown Coal Research Institute
Restoration Ecology | Year: 2012

Variation in soil properties may influence diversity of invertebrate communities, a crucial component of every ecosystem, and their impact should be considered also in restoration management. Although most spoil heaps have been reclaimed after brown coal mining, some post-mining sites are left to natural succession. Little is known, however, about the effects of these two fundamentally different approaches on diversity of invertebrates inhabiting these stands. While controlling for habitat characteristics, we analyzed the effects of soil properties on species richness of seven invertebrate groups representing various trophic levels and diverse spatial niches at afforested spoil heaps and adjacent pits managed under these two basic restoration approaches in the North Bohemia Brown Coal Basin (Czech Republic, central Europe). Forty-seven percentage of 140 invertebrate species occurred on both reclamations and successions, but many were found exclusively on successions (37%) or reclamations (16%). The species richness of various groups was affected by different soil properties either independently of other variables or in interaction with microclimatic conditions or management history. These results imply a need for diverse management approaches in post-mining areas to support the diversity of invertebrate communities. Technical reclamations with artificial plantations and spontaneous forest development on bare substrate (thus creating mosaics of open patches and afforested stands with different soil deposit materials) were found to be reasonable alternatives to support invertebrate richness on post-mining forested stands. We conclude that these two approaches should properly be combined in practice. © 2011 Society for Ecological Restoration International.

Kusy J.,Brown Coal Research Institute | Andel L.,Brown Coal Research Institute | Safarova M.,Brown Coal Research Institute | Vales J.,Brown Coal Research Institute | Ciahotny K.,Institute of Chemical Technology Prague
Fuel | Year: 2012

As expected, the coal would be, regarding to its equally distributed reserves, potentially substitutive resource for the crude oil as the raw material for the production of liquid fuels. The main objective of the transformation processes from coal to liquid fuels is production of diesel and petrol. In the European Union there are several activities aimed to the liquefaction of coal, regarding to suitable and tested coal to liquid (CTL) processes in Europe. EUROCOAL organisation confirmed CTL associated with Carbon dioxide capture and storage (CCS) as the best utilisation of European coals. Brown coal research institute j.s.c., within the framework of research projects, is also interested in the technological resolution of CTL techniques. In the presented paper, research is aimed to the possible use of various Czech coals for those purposes. Several types of Czech coal from various mines were analysed for the basic technological characteristics and pyrolised under specific conditions. Obtained products (solid, liquid and gaseous) were analysed. Liquid product - brown coal tar was consequently hydrogenised in the reactor on the temperature 300 °C under the pressure of 1 up to 30 bar with the presence of hydrogenation catalyst Co-Mo (Cobalt-Molybden). Products of the hydrogenation were analysed by the GC-MS chromatography and results were compared to the input tar. © 2010 Elsevier Ltd. All rights reserved.

Fecko P.,VSB - Technical University of Ostrava | Vales J.,Brown Coal Research Institute
28th Annual International Pittsburgh Coal Conference 2011, PCC 2011 | Year: 2011

The paper deals with research in new potential flotation agents for black coal and their comparison with an industrially applied flotation agent Montanol 508, which is used in the black coal preparation plants both in the Czech Republic and Poland. The potential flotation agents are a liquid organic phase from pyrolysis of brown coal disposed of pyrogenetic water (brown-coal tars). The experimental flotation tests are implemented using black coal samples from Darkov Mine in the CR. The effectiveness criterion of the work is to obtain flotation concentrate quality with ash content below 10 %. The results imply that it is possible to produce flotation agents from brown coal tars, which may come in useful in the flotation of black coal.

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