Brown Coal Bulletin, 2010 (vol. 50), issue 2
Sealing properties of filling mixtures
Ing. Jan Kostka, Mgr. Petr Otipka, Ing. Jiří Lukš, Ph.D.
Zpravodaj Hnědé uhlí 2010, 50(2)
This paper focuses on the flue ash as a waste material which can be used for filling main mine workings, especially filling pit shafts with consolidated filling material. The intention was to propose and assess new formulas of filling mixtures. A special emphasis was put on favourable impacts of ingredients on sealing properties of mixtures securing water- and gasproofness of treated mine workings.
Hydrogenation of brown-coal tar
Ing. Marcela Šafářová, Ph.D., Jaroslav Kusý, Ing. Lukáš Anděl
Zpravodaj Hnědé uhlí 2010, 50(2)
The paper outlines laboratory experiments on hydrogenation of brown coal tar which is a by-product of brown coal pyrolysis. The experiments were conducted in a pressure reactor under 300 degrees of Celsius and different pressure of hydrogen used as a hydrogenation medium. Brown coal tar sample was prepared by the pyrolysis of brown coal samples representing different brown coal ranks occurring in the coal basin in the north-western Bohemia. Qualitative parameters were determined for the tar as a feedstock and for the hydrogenation products - gaseous, liquid, organic phase, and hydrogenation residue. The yield of these products was also determined in...
Tar Occurrence and Distribution in Brown Coal from North-western Brown Coal Basin
Ing. Vlastimil Macůrek, RNDr. Ing. Josef Valeš, Jaroslav Kusý, Ing. Lukáš Anděl, Ing. Marcela Šafářová, Ph.D.
Zpravodaj Hnědé uhlí 2010, 50(2)
The paper deals with tar content in brown coal from North-western Brown Coal Basin. Tar development and distribution in differentparts of the basin is assessed in order to distinguish areas where the quality of tar is proper for possible chemical conversion of browncoal into liquid and gaseous fuels.
Geothermal gradient and rock temperature prognosis made on the SCILAB platform
Ing. Denisa Fiurášková, prof. Ing. Pavel Prokop, CSc.
Zpravodaj Hnědé uhlí 2010, 50(2)
The paper deals with the prognosis of the thermal gradient and rock temperature. The importance of rock massive temperature is increasing in relation with the increasing depth of coal exploited in underground mines. Higher rock temperatures have an adverse effect on working conditions in underground mines. Thus, the prognosis of rock temperature has to be done very carefully when designing new mining levels, especially when working is done under the main haulage level. Rock temperature is the basic parameter for designing mine ventilation and conditioning in order to guarantee that these systems will be effective from the economic as well as safety...
Geological and hydrogeological conditions in the Lukovský stream valley before Radovesice dump building
Ing. Josef Halíř, Ph.D., Míla Pletichová
Zpravodaj Hnědé uhlí 2010, 50(2)
Radovesice dump is situated in the vicinity of the town of Bílina in the north-western Bohemia. The dump is operated by Severočeské doly (a mining company). The plan for building a large-scale elevated dump outside the former Maxim Gorkij Mine was designed in 1961. The intended area for dumping about 1 billion cubic meters of overburden was located in the Lukovský stream valley in cadastral districts of Radovesice, Dřínek, Lyskovice, and Hetov. The geological conditions of this area were very diverse and influenced the hydrogeological conditions to a considerable extent. The level of exploration concerning this area and methods of dump bed dewatering...
Coal Mining and Mining Landscape Changes in the Region of Karvinsko
doc. RNDr. Jan Havrlant, CSc.
Zpravodaj Hnědé uhlí 2010, 50(2)
Coal mining development in recent years and impacts of underground hard coal mining on the landscape of the region of Karvinsko are the main topics of this article. A special focus is put on following issues: subsidence consequences in the region of Karvinsko, which is a part of the coal basin of Ostrava; changes in waste utilisation and disposal; reclamation of the affected landscape; positive changes of mining landscape which results from environmental measures and activities carried out by the company of Ostravsko-karvinské doly, a. s., by the Municipality of Karviná, and by other involved organisations. All these involved entities aim at protecting...
Hydroseeding for erosion control on spoil banks at the Nástup Tušimice Mine
Vratislav Ondráček, Ing. Petr Čermák, CSc.
Zpravodaj Hnědé uhlí 2010, 50(2)
The planting technology of hydroseeding, further improved by using shrub and tree species seeds, was tested at the Nástup Tušimice Mine in order to control erosion on slopes of a steeper gradient, which are composed of pedologically different overburden rocks where initial weed communities had already developed by primary succession. One year after hydroseeding application, two completely different situations were observed concerning vegetation cover and erosion control, while no tree or shrub species contained in the hydroseeding slurry occurred.
Mining impacts on water quality in the Olše River
Ing. Jarmila Schwalbová
Zpravodaj Hnědé uhlí 2010, 50(2)
Huge amounts of mine water are pumped to the surface in the region of Upper Silesian Coal Basin. The water is subsequently discharged into several surface water streams substantially influencing water quality in the Olše River. The paper assesses the impacts of mining activities on water quality in this river. From 2000 to 2007, approximately 28 331 700 m3 of mine water was discharged via Karvinský stream into the Olše River. Mine water originating in the Polish part of the Upper Silesian Coal Basin is discharged into the "OLZA collector". The reconstruction and relocation of this collector made in 2004 resulted in a distinct decrease of the load in...
Výzkumný fond pro uhlí a ocel - příležitost pro české organizace
Ing. Marcela Šafářová, Ph.D.
Zpravodaj Hnědé uhlí 2010, 50(2)
Závěrečná konference Regionální kontaktní organizace Severozápadní Čechy
Ing. Alena Miletičová
Zpravodaj Hnědé uhlí 2010, 50(2)