Brown Coal Bulletin, 2011 (vol. 51), issue 1
Basalt organs near Rotava in the region of Sokolov
RNDr. Petr Rojík, Ph.D.
Zpravodaj Hnědé uhlí 2011, 51(1)
The paper describes the geological setting, composition and origin of the stone organs of the Varhany and Skalka hills near Rotava, north of Sokolov. The volcanic bodies are situated along the fault system that separates the Sokolov Basin and the uplifted area Krušné Hory Mountains. The architecture and composition of both volcanic bodies was studied by means of geological mapping and petrological, geochemical, and structural geological methods. The hills are likely Miocenic cumulo-domes of basanitic composition. Varhany is a single dome elevated during one volcanic effusion of nepheline basanite above prolonged vents and subsequently rapidly solidified...
New findings on mineralogy of North Bohemian Brown Coal Basin discovered in the period from 2002 to 2009
Zdeněk Dvořák, Ing. Jiří Svejkovský, Ing. Oldřich Janeček, RNDr. Michal Řehoř, Ph.D.
Zpravodaj Hnědé uhlí 2011, 51(1)
The paper deals with the mineralogy of North Bohemian Brown Coal Basin in the territory between the towns ústí nad Labem and Klášterec nad Ohří. Here, coal is mined at five open pit mines situated in the Tertiary brown coal basin. Research focused on new minerals discovered in sediments of the coal basin by geologists. The paper summarizes new findings from the years 2002-2009 when five minerals were identified as new ones for the North Bohemian Brown Coal Basin. They include anorthite, esseneite, ferrierite, melilite, and srebrodolskite. In total, 59 minerals were identified in the basin.
Results of pore pressure measurements in the body of Radovesice dump and possible alert indication
Ing. Lukáš Žižka, Ing. Josef Halíř, Ph.D., Vratislav Ondráček
Zpravodaj Hnědé uhlí 2011, 51(1)
The paper provides basic data on recently established monitoring sites and results of pore pressure measurements in the body of Radovesice dump. In the area of Radovesice dump, an extensive monitoring network was established at the site which was affected by landslides in 1994. At first, 14 hydrogeological boreholes were established. Casing of the boreholes was placed up to different aquifers of the dump and its underlying bed. The level of groundwater is monitored in these boreholes on a long-term scale. At present, groundwater level is measured only in 8 boreholes. During the years 2009 and 2010, the monitoring network was extended by 3 new boreholes,...
Abandonment of Kohinoor Mine - part 2, abandonment of old workings up to 2009
Ing. Jiří Varady
Zpravodaj Hnědé uhlí 2011, 51(1)
The paper briefly describes the last period of the abandonment of Kohinoor Mine, which included the remaining opening vertical workings, mine shafts K 1 and MR 1, and adjacent mine workings. In contrast to backfilling, a traditional way of opening mine workings abandonment, the mine shaft MR 1 was plugged and pumping columns were installed. The purpose of such an approach was other utilisation of the shaft as a source of mine water. The paper describes the sequence of old workings abandonment and the way of opening vertical workings abandonment in the period from 2008 to 2009. Different ways of opening mine workings abandonment are included; either...
Particle size distribution of resuspendable components of samples taken at brown coal open pit mine in resuspension chamber
Mgr. Martin Civiš, RNDr. Jan Hovorka, Ph.D., RNDr. Devraj Thimmaiah, Ph.D.
Zpravodaj Hnědé uhlí 2011, 51(1)
A cylindrical chamber for resuspension of solid particles was constructed (V=0,437 m3, S=3,5 m2, S/V=8,38 m-1) for measuring particle size distribution, counting formed aerosol particles, and withdrawing particle fractions segregated by size. Samples of brown coal, fly-ash, flue gas desulfurization gypsum, and overburden material taken at north-western open pit Nástup were investigated. The samples were pneumatically dispersed in the chamber at defined temperature and humidity conditions (20 °C and relative humidity 50 %). Average particle size distributions were determined. According to measurements, fly-ash and coal powder originating from mine roads...
Research Fund for Coal and Steel - participation of Czech organizations in projects submitted in 2010
Ing. Marcela Šafářová, Ph.D.
Zpravodaj Hnědé uhlí 2011, 51(1)
The paper informs about the Research Fund for Coal and Steel (RFCS), which funds research projects related to steel and coal. Both private companies and research institutes may apply. The fund may finance research, pilot, and demonstration projects outside EU Framework Programmes. The fund is mainly aimed at improving the competitiveness of both coal and steel related fields of industry. Among the priorities of the coal part of the programme are improvement of the competitive position of Community, health and safety in mines, and improvement of the use of coal as a clean energy source. The fund co-finances successful and accepted projects from its...