scholarly journals Investigation into the Temperature Fields of the Carboniferous Rock Mass in the Czech Part of the Upper Silesian Coal Basin

2017 ◽  
Vol 191 ◽  
pp. 583-590
Author(s):  
Vlastimil Kajzar ◽  
Zdeněk Pavelek ◽  
Petr Koníček ◽  
Radovan Kukutsch
Keyword(s):  
Rock Mass ◽  
Temperature Fields ◽  
Coal Basin ◽  
Upper Silesian Coal Basin ◽  
Carboniferous Rock

Primary Rock Temperature Fields in Czech and Polish Part of the Upper of the Upper Silesian Coal Basin / Pole temperatury pierwotnej skał w czeskiej i polskiej części górnośląskiego okręgu węglowego

2013 ◽  
Vol 58 (1) ◽  
pp. 55-72
Author(s):  
Libor Doležal ◽  
Józef Knechtel ◽  
Antonín Taufer ◽  
Ludvík Trávníček
Keyword(s):  
Temperature Field ◽  
Rock Mass ◽  
Complex Analysis ◽  
Decisive Role ◽  
Temperature Fields ◽  
Coal Basin ◽  
Upper Silesia ◽  
The Earth ◽  
Rock Temperature ◽  
Upper Silesian Coal Basin

Knowledge of the temperature of rock mass is no doubt of substantial meaning, both for the solution of economicaly demanding protection of mine workers in difficult microclimatic environment and for perspective usage of geothermal energy from the depth of the earth. International cooperation of our and Polish specialists is in this sense more than welcome, also because the exploitation of coal seams takes place in the same Upper Silesia rock coal basin. This profesional article is concentrated on complex analysis of temperature fields of the Ostrava- Karviná district, mainly from results of thermologging measurements in geological survey boreholes both on surface and underground, and also from the actual temperature measurements in the coal mines. One chapter of this article describes the original approach to the survey of temperature field and its prognosis in the Polish part of the Upper Silesia coal basin by a researcher from GIG Katowice. The most suitable method of analysis of primary temperature field seemed the preparation of isocurves of temperature(isothermal lines) for the existing mine working areas, even if the method of obtaining them was different. The Czech method is based on determination of the quantitative dependence of temperature on the rock mass depth from the abovementioned measurement results, calculation of geothermal gradients and the following recalculation of real temperature values for various depth levels. Then isothermal lines for these depth levels are created together with colour distingushing of their value limits. The Polish method is sufficiently described in a dedicated chapter. The conclusion of the article underlines the decisive role of the structuraly tectonic composition of the rock mass on the temperature field in the long term thermic evolution of the Earth.

scholarly journals Land Surface Subsidence Due to Mining-Induced Tremors in the Upper Silesian Coal Basin (Poland)—Case Study

2020 ◽  
Vol 12 (23) ◽  
pp. 3923
Author(s):  
Paweł Sopata ◽  
Tomasz Stoch ◽  
Artur Wójcik ◽  
Dawid Mrocheń
Keyword(s):  
Rock Mass ◽  
Land Surface ◽  
Continuous Monitoring ◽  
Geological Structure ◽  
Vertical Surface ◽  
Coal Basin ◽  
Surface Displacements ◽  
Upper Silesian Coal Basin ◽  
Mining Tremors

Seismic phenomena threaten land-based buildings, structures, and infrastructure and can transform land topography. There are two basic types of seismic phenomena, namely, tectonic and anthropogenic, which differ mainly in epicenter depth, surface impact range, and magnitude (energy). This article shows how a land surface was changed by a series of seven rock mass tremors of magnitude ML = 2.3–2.6 in March–May 2017. Their immediate cause was the “momentary” acceleration of void clamping, which was activated by local and short-term seismic phenomena caused by human activity. The induced seismic events resulted from the geological structure of the rock mass, which in the specific region of examination was classified as being highly prone to mining tremors. The authors focused on describing vertical surface displacements in the Upper Silesian Coal Basin in the south of Poland. The surface deformations were identified using DInSAR technology, which allows quasi-continuous monitoring of large areas of land surface. The present research used freely available data from the Copernicus Program and seismic data from the European Plate Observing System.

scholarly journals Resource Assessment and Numerical Modeling of CBM Extraction in the Upper Silesian Coal Basin, Poland

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2153 ◽  
Author(s):  
Jarosław Chećko ◽  
Tomasz Urych ◽  
Małgorzata Magdziarczyk ◽  
Adam Smoliński
Keyword(s):  
Numerical Modeling ◽  
Rock Mass ◽  
Methane Production ◽  
3D Model ◽  
Resource Assessment ◽  
Volumetric Method ◽  
Coal Seams ◽  
Coal Basin ◽  
Upper Silesian Coal Basin ◽  
Reservoir Simulator

The paper presents the assessment of the resources of methane considered as the main mineral in the most prospective selected areas of the Upper Silesian Coal Basin, Poland in the region of undeveloped deposits. The methane resources were estimated by means of a volumetric method at three depth levels, 1000, 1250, and 1500 m. A part of the Studzienice deposit comprising three coal seams, 333, 336, and 337, located in a methane zone was chosen for the numerical modeling of simulated methane production. The presented static 3D model has been developed using Petrel Schlumberger software. The total resources of methane in the area amount to approximately 446.5 million of Nm3. Numerical simulations of methane production from the selected coal seams with hydraulic fracturing were conducted by means of Schlumberger ECLIPSE reservoir simulator. Based on the simulations, it was concluded that, in the first six months of the simulations, water is produced from the seams, which is connected with the decrease in the rock mass pressure. The process prompts methane desorption from the coal matrix, which in turn results in a total methane production of 76.2 million of Nm3 within the five-year period of the simulations, which constitutes about 17% of total methane resources (GIP). The paper also presents a detailed analysis of Polish legislation concerning the activities aimed at prospecting, exploring, and extracting the deposits of hydrocarbons.

scholarly journals Numerical Modeling of CO2 Migration in Saline Aquifers of Selected Areas in the Upper Silesian Coal Basin in Poland

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3093 ◽  
Author(s):  
Tomasz Urych ◽  
Adam Smoliński
Keyword(s):  
Rock Mass ◽  
Co2 Storage ◽  
Regional Scale ◽  
Simulation Models ◽  
Saline Aquifers ◽  
Storage Process ◽  
Coal Basin ◽  
Hydrogeological Parameters ◽  
Upper Silesian Coal Basin ◽  
Geological Formations

Determining the characteristics of the dynamic behavior of carbon dioxide in a rock mass is a stage in the process of assessing a potential CO2 storage reservoir. The aim of this study was to analyze the process of CO2 storage in saline aquifers of the selected regions of the Upper Silesian Coal Basin in Poland. The construction of dynamic simulation models was based on static models of real deposit structures developed on a regional scale. Different simulation variants of the CO2 storage process were adopted, varying in terms of injection efficiency and duration of individual simulation phases. The analysis examined the influence of the degree of hydrodynamic openness of the structure on the CO2 storage process, in each of the variants. The results of numerical simulations showed that among the three analyzed geological formations, the Dębowiec formation is the most prospective for potential CO2 storage and is characterized by the most favorable geological and hydrogeological parameters. In the best variant of the simulation, in which the safety of CO2 storage in the rock mass was taken into account, the total amount of CO2 injected in a single directional well was approximately 8.54 million Mg of CO2 during 25 years of injection.

Rockburst Hazard Assessment in Bedded Rock Mass: Laboratory Tests of Rock Samples and Numerical Calculations

2014 ◽  
Vol 59 (3) ◽  
pp. 591-608 ◽  
Author(s):  
Antoni Tajduś ◽  
Jerzy Cieślik ◽  
Krzysztof Tajduś
Keyword(s):  
Rock Mass ◽  
Laboratory Tests ◽  
Numerical Calculations ◽  
Coal Basin ◽  
Damage Development ◽  
Rockburst Hazard ◽  
Rock Samples ◽  
Upper Silesian Coal Basin ◽  
Damage Process ◽  
Bedded Rock

Abstract The paper presents the results of analyses on tendency of bedded rock mass towards rockburst, carried out on the basis of laboratory tests of rock samples and determined indices, as well as by means of numerical calculations. The first part of the paper discusses selected parameters evaluating the tendency of rocks towards burst, on the basis of which the analysis was carried out in order to assess rockburst hazard in selected complexes of strata in Upper Silesian Coal Basin. Rockburst hazard in bedded rock mass is also analyzed with the use of numerical methods and the results of calculations of rock damage development in the exploitation front during coal deposit extraction are presented. Burst hazard of rock mass is studied through the changes of intensiveness of damage process in the area of exploitation front.

scholarly journals Phosphorus Content in Deposits of Zofiówka Monocline (Sw Part of the Upper Silesian Coal Basin)

2014 ◽  
Vol 30 (2) ◽  
pp. 67-83 ◽  
Author(s):  
Marek Marcisz
Keyword(s):  
Phosphorus Content ◽  
Coal Basin ◽  
Upper Silesian Coal Basin

Streszczenie Przeprowadzono charakterystykę zmienności zawartości fosforu w 29 pokładach węgla kamien- nego złóż Pniówek i Zofiówka, występujących na monoklinie Zofiówki. Dokonano tego na podstawie utworzonej cyfrowej bazy danych obejmującej 2730 próbek, spośród których w 1674 oznaczono zawartość tego pierwiastka. Przeprowadzono podstawowe analizy statystyczne, za pomocą których określono m.in. liczbę próbek, w któiych oznaczono zawartość fosforu w poszczególnych pokładach, a także minimalną, maksymalną oraz średnią zawartość tego pierwiastka w danym pokładzie. Prześledzono zmiany zawartości fosforu w układzie horyzontalnym (w dwóch kierunkach: E-W oraz N-S) i wertykalnym (wraz z głębokością). Wykreślono także mapy izolinii zawartości fosforu we wszystkich badanych pokładach węgla. Wyniki badań wykazały, że zawartość fosforu w badanych pokładach złóż monokliny Zofiówki zmienia się w szerokim zakresie od 0,001 do 0,550% Pa (śr. 0,064%). Występuje w nich zatem węgiel o stosunkowo wysokiej - niekorzystnej przy produkcji koksu - zawartości fosforu. Najniższymi zawartościami tego parametru odznaczają się pokłady 417/1, 418/1-2, 502/1 oraz 505/1, najwyższymi natomiast -362/1 i 406/1. Nie wykazano żadnej ogólnej tendencji zmian zawartości fosforu. W każdym z pokładów obserwuje się odmienny charakter tych zmian. Nie stwierdzono także żadnego powiązania z przynależnością stratygraficzną.

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