Brown Coal Bulletin, 2011 (vol. 51), issue 4
First part of geophysical survey in the landslide area of the north-western slopes of the ČSA open pit mine
Mgr. Jan Burda, RNDr. PhDr. Jiří Dohnal
Zpravodaj Hnědé uhlí 2011, 51(4)
Compared to traditional ways of conducting geological survey, such as exploration boreholes, geophysical prospecting methods are less invasive, faster, and less expensive. Therefore, a vertical electrical sounding was recommended as an additional geological survey in the landslide area bellow Jezerka hill. The survey aimed at determining the bottom of Quaternary sediments and particular Quaternary accumulation layers of various grain sizes. As a result, three to four different layers were determined in particular profiles. The method proved to be suitable when detecting coarse or lumpy deluvium, although failed to determine the course of the Quaternary...
Occurrence of claystone sorbents in the surroundings of brown coal basins in the north-western Bohemia and their possible utilisation
RNDr. Michal Řehoř, Ph.D., Dr. Ing. Lubomír Chytka
Zpravodaj Hnědé uhlí 2011, 51(4)
Claystone sorbents are among most important raw material in the Czech Republic. Bentonite is the best known claystone sorbent, mainly occurring in sites adjacent to České Středohoří Mountains and Doupovské Hory Mountains. Nevertheless, there are several significant occurrences of bentonite in sediments of brown coal basins. The paper deals with geological conditions of main bentonite locations, bentonite properties, and possible ways of its utilisation. A special focus is put on possible utilisation of bentonite for land reclamation of spoil banks originating from brown coal mining.
Ecological restoration as a possible way for reclamation of spoil bank after brown coal mining
Mgr. Martin Kabrna
Zpravodaj Hnědé uhlí 2011, 51(4)
Ecological restoration of landscape affected by man has recently gathered an increasing attention of professionals as well as the public. The key aspect of any ecological restoration is the chosen level of restoration which has to be achieved. Theoretically, three levels can be distinguished - reclamation, rehabilitation, and restoration. In practise, only reclamation is usually feasible, or rehabilitation in some cases. In most cases, the true restoration is economically unbearable and therefore unrealistic. The major goal of ecological restoration is reestablishment of ecosystem function or ecosystem structure, which usually means biodiversity. Many...
Some critical comments on spontaneous succession in terms of land reclamation
Ing. Konstantin Dimitrovský, Ing. Barbora Eliášová, DiS., Ing. Dana Prokopová, Ph.D.
Zpravodaj Hnědé uhlí 2011, 51(4)
There is not a uniform conclusion when assessing the importance of spontaneous and assisted succession. The paper deals with an analysis of arguments in the field of land reclamation using unassisted and spontaneous succession. Two different spoil banks were used as a model territory, one in the Sokolov region, the other in Chomutov region. The extent of the paper does not allow a detailed description of particular methods and procedures. Nevertheless, it points out the changes in the perception of succession on spoil banks, including the issue of biodiversity.
Using vertical fallout chamber to determine dust fallout
Ing. Jan Brejcha
Zpravodaj Hnědé uhlí 2011, 51(4)
In the framework of aerosol particles monitoring from fugitive sources, a pilot measuring device has been set up and tested to determine dust fallout. The pilot aimed at determining the potential of different materials to emit dust particles concerning a free fall of material flow. Various dusty materials typical of open pit brown coal mining were tested - overburden material, coal dust, and sand from an unloading dump. Ten partial tests were conducted for each kind of material. Dusting of material was expressed as a ratio of emitted dust weight to total weight of the sample. As the partial tests showed a great variability, it can be concluded that...
Daily and seasonal dynamics of PM10 and PM1 in the fall line of the slope of the Nástup Tušimice Mine
Mgr. Michal Grégr, RNDr. Jan Hovorka, Ph.D., Ing. Jan Brejcha
Zpravodaj Hnědé uhlí 2011, 51(4)
During two summer and one winter sampling campaigns, concentration of PM10 and PM1 were taken every 5 minutes following the fall line of the north-eastern slope of the Nástup Mine. In summer, PM1 levels did not show any differences throughout the fall line, although the daily dynamics was observed only in 2009, not in 2010. In contrast, PM10 levels showed daily dynamics in both years and were higher within 60 metres above the coal seam. Aerosol concentration in the adjacent area of the mine was temporarily elevated in five cases, while the response reached 23 to 39 % of PM10 levels measured in the mine. On-site measurements revealed that mining activities...
Seasonal variability of coarse aerosol (> 1μm) in Březno near Chomutov
Mgr. Petra Pokorná, RNDr. Jan Hovorka, Ph.D., Mgr. Michal Grégr, Ing. Jiří Kroužek
Zpravodaj Hnědé uhlí 2011, 51(4)
Seasonal variability of the 24 hour concentration of coarse aerosol including particle sizes 1 to 10 μm (PM1-10) was assessed in Březno,a village near Chomutov. Aerosol particles were taken by use of a Personal Cascade Impactor Sioutas during three summer sampling campaigns (in the years 2008, 2009, and 2010) and two winter campaigns (2009 and 2010). Statistically, the summer and winter campaigns were different. PM10median was higher in winter campaigns (28.2 μg/m3) compared to summer periods (18.3 μg/m3). In contrast, PM1-10 median was lower in winter (1.8 μg/m3) than in summer (4.7 μg/m3). In summer with prevailing W to NW wind, the...