Brown Coal Bulletin, 2020 (vol. 60), issue 4
Climate change in the region of NW Bohemia and their expected impact on mining activities and reclamation work
Ing. Pavel Schmidt, RNDr. Michal Řehoř, Ph.D., doc. Ing. Petr Vráblík, Ph.D.
Zpravodaj Hnědé uhlí 2020, 60(4)
The Brown Coal Research Institute, plc. is currently carrying out a long-term research into the development of the climate of the Czech Republic and its impact on mining activities as part of a European Union research project called TEXMIN. The topic of the research is the overall evaluation of the climatic change in the Czech Republic and main attention is devoted to the Most Basin. It is known as the largest Czech brown coal deposit. The article summarizes the results achieved so far. It is primarily an evaluation of the development of temperature and precipitation since 1961, their forecast for the future and an assessment of the impact of these...
Geology of Quaternary sediments in the forefield of the ČSA quarry (Černice-Horní Jiřetín area)
Ing. Lukáš Žižka, Ph.D., Ing. Mária Jarolimová, Ph.D.
Zpravodaj Hnědé uhlí 2020, 60(4)
The presented article focuses on the geological structure of Quaternary sediments in the foreground of the ČSA quarry in the area between the villages of Černice village and Horní Jiřetín. The main erosion phase of the slope of the Ore Mountains as well as the peneplane took place at the end of the Pliocene and in the Pleistocene. It is only in this phase that the coarse clasts are transported to the basin and accumulated in the form of proluvial coverings, gravel cones and piedmont gravel rim.
New mineralogical findings from bentonite deposits in the Most Basin
RNDr. Michal Řehoř, Ph.D., Ing. Jiří Svejkovský
Zpravodaj Hnědé uhlí 2020, 60(4)
Two large bentonite quarries, Černý vrch and Rokle, are situated in the area of the Most Basin. The article briefly summarizes the geological situation and previous results of the mineralogical research of both localities. The main part of this paper is devoted to the new research realized in the summer 2019. It summarises the results of the mapping, sampling and X-RAY analyses. The first paleontological discoveries carried out after the end of this research stage are described here, too.
Increasing the lifespan of wheeled excavator cutting parts
Ing. Vlastimil Moni, Ph.D., Ing. Lubomír Donát, Ph.D.
Zpravodaj Hnědé uhlí 2020, 60(4)
The article briefly presents the progress of work on the development of new types of buckets with corner cutters of the KU 800 Wheel Excavator and thus follows up with its content on a series of articles describing activities in the given issue for the period under review. Attention is paid to the results of operational testing of new prototypes of cutters on a real machine in mining conditions at the Vršany quarry site, on the basis of which further designs and modifications of the replaceable corner cutters were created. The new replaceable corner cutter was then mounted on the KU 800 excavator in order to verify the functionality of the geometry...