scholarly journals A Brief Overview Of Development In The Use Of Indicator Gases For Coal Spontaneous Combustion And Prospects For Further Solution / Stručný Přehled Vývoje Využití Indikačních Plynů Samovznícení Uhlí A Výhled Dalšího Řešení

2012 ◽  
Vol 58 (3) ◽  
pp. 13-22 ◽  
Author(s):  
Lukáš Snopek ◽  
Alois Adamus
Keyword(s):  
Czech Republic ◽  
Coal Mining ◽  
Final Stage ◽  
Spontaneous Combustion ◽  
Development Trend ◽  
Coal Spontaneous Combustion ◽  
The Czech Republic ◽  
Input Information ◽  
Complicated Process ◽  
Mine Fires

Abstract One of the most serious risks associated with mining using mainly underground methods is the risk of mine fires. Causes of these fires can be exogenous (external) or endogenous (internal). The authors of the article pay attention to endogenous fires in coal mines, especially to the timely indication of them. As already mentioned in many contributions, spontaneous combustion is a complicated process that passes, in the final stage, into a mine open fire. The localization of a place of such danger can be done by means of so-called indicator gases that are desorbed from the coal substance at a point of the originating seat of spontaneous combustion. The article deals with a development trend in the use of indicator gases for spontaneous combustion in coal mining. The objective of the authors was to arrange chronically and briefly knowledge of the use of indicator gases both abroad and in the Czech Republic and to provide input information about a research project being dealt with at present

The Pre-Controlling Technology of Spontaneous Combustion in Gutter-Up Gob for Fully Mechanized Top-Coal Caving Face

2013 ◽  
Vol 634-638 ◽  
pp. 3688-3695 ◽  
Author(s):  
Yang Xiao ◽  
Shu Gang Li ◽  
Jun Deng ◽  
Xu Wang
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Fly Ash ◽  
Coal Mining ◽  
Spontaneous Combustion ◽  
Good Effect ◽  
Air Leakage ◽  
Coal Spontaneous Combustion ◽  
Liquid Carbon ◽  
Fire Extinguishing

In China, as popularizing the technology of fully mechanized top-coal mining and increasing the strength and depth of mining, the gutter-up gob can be formed. But the work of fire preventing and extinguishing for its coal spontaneous combustion is more complexity and difficulty. In this paper, based on geology parameters and mining practice for 93up12 fully mechanized top-coal caving face in Nantun coalmine, the form and character of gutter-up gob are analyzed. According to the hidden danger of high temperature for spontaneous combustion in the gob, we adopt the comprehension technologies of fire extinguishing and preventing which include sealing air-leakage, grouting, and injecting compound gel with fly-ash, foam of retarding oxidation, liquid carbon dioxide, and gas of nitrogen. By putting in practice the pre-controlling technology in gutter-up gob and monitoring data of target gases, it obtains a good effect and ensures the safety in production of the fully-mechanized top-coal caving face.

scholarly journals Exploring and explaining participation in local opposition: brown coal mining in Horní Jiřetín

2020 ◽  
Author(s):  
Filip Černoch ◽  
Lukáš Lehotský ◽  
Petr Ocelík ◽  
Jan Osička
Keyword(s):  
Czech Republic ◽  
Coal Mining ◽  
Brown Coal ◽  
Political Context ◽  
The Political ◽  
Northwestern Part ◽  
Research Project ◽  
The Czech Republic ◽  
Local Opposition ◽  
Opposition Movement

This book summarizes a three-year research project on local opposition to coal mining in the Northwestern part of the Czech Republic. The research focused on the relational dimensions of the opposition movement and the political context in which the movement operates.

scholarly journals NEW POSSIBILITIES OF CALCULATING THE VOLUMES OF EXTRACTED MASSES IN THE SURFACE MINING OF BROWN COAL

2017 ◽  
Vol 63 (3) ◽  
pp. 8-17
Author(s):  
Dana Vrublová ◽  
Roman Kapica ◽  
Beáta Gibesová ◽  
Jaroslav Mudruňka
Keyword(s):  
Czech Republic ◽  
Real Time ◽  
Coal Mining ◽  
Brown Coal ◽  
Surface Mining ◽  
Spatial Position ◽  
Mining Technology ◽  
The Czech Republic ◽  
Time Motion ◽  
Volume Calculations

Abstract The companies engaged in brown coal mining are looking for ways of managing the mining process as efficiently as possible. The principal mining technology used for brown coal mining in our country, but also in Germany and Poland, are wheel excavators. The evolving GNSS technology has enabled designing and realisation of systems for determining the spatial position of the excavator wheel. The visualisation of the wheel's spatial position and tracking of its real-time motion is performed in the Czech Republic by the program Mine Model developed by the company KVASoftware. One of the most important tasks of mine surveyors is the calculation of the volumes of the extracted masses. The described system performs this task in real-time. This article describes an application that is used to automate volume calculations.

Anti-fossil frames: Examining narratives of the opposition to brown coal mining in the Czech Republic

2019 ◽  
Vol 54 ◽  
pp. 140-149 ◽  
Author(s):  
Filip Černoch ◽  
Lukáš Lehotský ◽  
Petr Ocelík ◽  
Jan Osička ◽  
Žaneta Vencourová
Keyword(s):  
Czech Republic ◽  
Coal Mining ◽  
Brown Coal ◽  
The Czech Republic

scholarly journals Overview of Research and use of Indicator Gases of Coal Spontaneous Combustion in China / Přehled Výzkumu a Využití Indikačních Plynů Samovznícení Uhlí V Číně

2014 ◽  
Vol 60 (1) ◽  
pp. 55-65 ◽  
Author(s):  
Xiyang Feng ◽  
Alois Adamus
Keyword(s):  
Spontaneous Combustion ◽  
Experimental Methods ◽  
Paper Briefly ◽  
Coal Spontaneous Combustion ◽  
Laboratory Equipment ◽  
Significant Development ◽  
The Sixties ◽  
Mine Fires ◽  
Spontaneous Combustion Of Coal ◽  
Program Characteristics

Abstract The beginnings of research and use of results in the area of indicator gas application for early detection of spontaneous combustion of coal in China comes from the sixties of the last century. The significant development occurred in the nineties, when the program “Characteristics of the adsorption of coal oxygen and its application in the prevention of mine fires” had been completed. The paper briefly describes an overview of the historical development, achievements, experimental methods, laboratory equipment, legislation, and the outlook for the use of indicator gases of coal spontaneous combustion in China

scholarly journals Development of regional unemployment characteristics in the Czech Republic

2012 ◽  
Vol 49 (No. 12) ◽  
pp. 571-578 ◽  
Author(s):  
J. Dufek
Keyword(s):  
Czech Republic ◽  
Unemployment Rate ◽  
Development Trend ◽  
Linear Functions ◽  
The Czech Republic ◽  
Regional Unemployment ◽  
Regional Unemployment Rate ◽  
Seasonal Indices ◽  
The Development Trend ◽  
Different Levels

The paper deals with statistical analysis of the registered regional unemployment rate in regions and districts of the Czech Republic from 1998 to 2002. Regional unemployment reaches significantly different levels; moreover, within the examined period, differences were increasing: variance between the minimum and the maximum increased approx. from 12% to 20% in the respective districts. By means of cluster analysis, regions are divided into more homogenous groups according to the registered unemployment rate by 31 December 2002. The following districts may be identified as the best ones: Praha-západ (Prague-West), Praha-východ (Prague-East), Praha (Prague) and Benešov; the following as the worst ones: Most and Karviná. Concerning regions, the lowest unemployment level may be identified in Praha (Prague); on the contrary, the highest levels were reached in Ústecký region and Moravskoslezský region. Variability, skewness and peak characteristics were calculated to evaluate the development of regional unemployment distribution. The average rose from 5.63% to 9.94%, the standard deviation rose from 2.53% to 4.15%, the variation coefficient stayed around 0.4. Thus, together with the increase in unemployment level, the absolute variability rose while the relative variability stayed approx. constant. The rate distribution was left-sided and increasing; the peak was only slightly higher than the standard peak. The development trend of the characteristics was evaluated by means of linear functions and higher order polynomials; their seasonal variation is described by seasonal indices differing in the degree of their seasonality and distribution in the course of a year. A correlation matrix demonstrates the relations between the trend of the characteristics and their seasonal indices.

Trends in the Quality of Life of the V4 Countries in the Field of Material Living Conditions

2018 ◽  
Vol 7 (2) ◽  
pp. 57-61
Author(s):  
Elena Hošková ◽  
Iveta Zentková ◽  
Tatiana Svetlanská
Keyword(s):  
Quality Of Life ◽  
Czech Republic ◽  
Development Trend ◽  
Living Conditions ◽  
The Czech Republic ◽  
Significant Positive Change ◽  
Data Source ◽  
The Individual ◽  
Level Of Living

Abstract Consumption and increasing level of living conditions are the main characteristics of society nowadays. Quality of life is necessarily related to living conditions of population, therefore form a basis of sustainable development. The aim of the article is to determine the economic conditions of the population in Visegrad countries (V4) based on the economic indicators of quality of life. The main data source is Eurostat for the period 2005–2017. In the paper is stated and analyzed development of eight indicators of quality of life in the field of material living conditions. They are divided into three groups: indicators on income, consumption and indicators related to the living conditions of the V4 population. The results of the analysis showed that residents of the Czech Republic have the highest quality of life, followed by Slovakia, Poland and Hungary. Position of the Czech Republic and Slovakia among the V4 countries is relatively stable over the reported period. The most significant positive change in several indicators of quality of life was recorded in case of Poland. As for the individual indicators, it was proved in case of Hungary, they had dramatic development without the statistical attributability of their development trend.

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