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Tytuł:
Supervisors competence and safety level in coal mines
Autorzy:
Martyka, J.
Powiązania:
https://bibliotekanauki.pl/articles/91989.pdf
Data publikacji:
2014
Wydawca:
Główny Instytut Górnictwa
Tematy:
competence
safety
supervisor
kompetencja
bezpieczeństwo
kierownik
Opis:
Purpose Both, theorists and practitioners of management emphasize that staff competence increasingly influences the proper operation of modern enterprises. This is significant not only when acquiring satisfactory work efficiency, but in connection to the required level of safety. Methods The aim of the research presented in this article is to determine essential issues in the area of underground coal mines supervisors (middle level managers) with regard to the safety level in coal mines. The research methods include survey, PAPI technique (Paper-and-Pencil-Interviewing) and a questionnaire. Supervisors from three mines participated in the research. The sample test was conducted deliberately, using a proportional scheme including the position in the supervisory department and the department type. Results Analysis of the results allowed for the evaluation of the twelve sub-categories of supervisors competence and knowledge level and their impact on the effectiveness of the maintenance of security. Moreover, the correlation between the determined level of separate competence sub-categories and their influence on the level of safety enabled the prioritization of the level of a lack of competence in reference to proper work safety maintenance. Practical implications The knowledge acquired on supervisors competence is to be applied to the prevention programme as a part of the following programme: "Methods of diagnosis and reduction programme of adverse effects related to the underground use of technical means..." (PBS, NCBiR No 1519/2012). Originality/ value The theoretical section of the article includes the original definition and competence model, as well as a model of compe-tence impact on the safety level in an enterprise. The approach to the research problem is also valuable – the issues of underground coal mines supervisors competence have been for the first time directly connected with the underground safety level.
Źródło:
Journal of Sustainable Mining; 2014, 13, 3; 26-35
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of sustainability assessment method of coal mines
Autorzy:
Burchart-Korol, D.
Krawczyk, P.
Czaplicka-Kolarz, K.
Turek, M.
Borkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/92001.pdf
Data publikacji:
2014
Wydawca:
Główny Instytut Górnictwa
Tematy:
sustainability
hard coal mine
life cycle assessment (LCA)
cost-benefit analysis
rozwój zrównoważony
kopalnia węgla kamiennego
analiza cyklu życia
analiza kosztów i korzyści
Opis:
Purpose This paper presents an algorithm developed to assess all aspects of sustainable development for hard coal mines. Additionally, an algorithm to assess the environmental efficiency and cost efficiency of mining production processes was presented. Methods To develop the computation algorithm, detailed models were proposed for environmental assessments using Life Cycle Assessment (LCA), whereas Cost-Benefit Analysis (CBA) was proposed for economic and social assessments. Results The algorithm developed is used when preparing a ranking of hard coal mines which considers the main aspects of sustainable development – environmental, economic and social. The tool also enables the performance of both environmental and cost assessment for particular unit processes of mining production. Practical implications The practical purpose is to devise an algorithm that will perform both partial and aggregated assessment of all aspects of the sustainable development of coal mines in Poland. Originality/ value It is the first method which includes all aspects of sustainable development and considers the process approach to assess coal mines.
Źródło:
Journal of Sustainable Mining; 2014, 13, 4; 5-11
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Equipment/machinery failure rate in hard coal mines
Autorzy:
Biały, Witold
Powiązania:
https://bibliotekanauki.pl/articles/2064408.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
mining machinery/equipment
failures
vibration pen
measurements
maszyny/urządzenia górnicze
awaria
pomiary
Opis:
The main task of the maintenance services in hard coal mines is to ensure continuous operation of the equipment (machines). The measurable effect of these actions should be the reduction of maintenance costs of equipment (machinery) and thus the reduction of production costs - coal mining. The paper presents an issue of failure rate of technical measures applied in the mining process. In order to ensure greater efficiency and productivity, it is necessary to find the causes of the most frequent failures in this process and effectively counteract them. As a result of these activities, the production availability of machines/equipment involved in the mining process will increase. This will to a large extent ensure failure-free and uninterrupted progress, increase productivity and improve the quality of manufactured products, as well as reduce the operating costs of equipment (machines), and thus reduce production and product costs. This effect should consist mainly in the control of rational, safe and effective use and operation of equipment (machines) in the exploitation process. An algorithm implemented in one of the hard coal mines was presented. The technical condition of underground mining equipment was observed by periodical measurements of vibration parameters at selected points on the machine - measurements were conducted with a vibration pen. The aim of this research is to improve the reliability of technological process of a mining plant through its failure-free operation. In order to achieve this objective, i.e. the efficiency of a mining company, it is necessary to reduce its costs. The action that leads to this aim is a proper assessment of the technical condition with regard to the equipment used in technological process.
Źródło:
New Trends in Production Engineering; 2019, 2, 1; 353--363
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Criteria for assessing the longevity of hard coal mines
Autorzy:
Frejowski, Aleksander
Kabiesz, Józef
Powiązania:
https://bibliotekanauki.pl/articles/1853834.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kopalnia
górnictwo
BHP w górnictwie
longevity of coal mines
safety in mining operations
MICMAC method
Opis:
The article presents the methodology for assessing the longevity of hard coal mines. Based on inter-national experts’ assessments, important criteria for determining mine viability have been presented. The results refer to Polish coal mines in the area of the Upper Silesian Coal Basin, however, the methodology itself can be applied to other geological and mining conditions of mines elsewhere. The results of structural analyses carried out using the MICMAC method for factors related to the mining geo-environment that may determine the longevity of individual hard coal mines are presented. The analyses were based on the results of expert surveys carried out using the Delphi method. The experts participating in the survey came from various countries and had extensive experience related to work or cooperation with hard coal mining. The criterion factors examined were assigned to two systems (groups) for which structural analysis was performed. The first group includes factors related to the level of exploitation hampering, while the second group includes factors related to hard coal quality and the availability of resources. As a result of the analyses the following were determined: the key factors which have the most significant influence on the system, result and goal factors, factors affecting the system and autonomous factors which have little effect on the system. The obtained results allowed to determine which factors should be taken into account in the process of determining the longevity of a hard coal mine.
Źródło:
Archives of Mining Sciences; 2020, 65, 3; 433-452
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perspektywy rybnickich kopalń węgla kamiennego
Prospects Rybnik coal mines
Autorzy:
Herok, J.
Powiązania:
https://bibliotekanauki.pl/articles/112744.pdf
Data publikacji:
2016
Wydawca:
STE GROUP
Tematy:
górnictwo
restrukturyzacja
opłacalność
współpraca kopalń
mining
restructuring
profitability
cooperation mines
Opis:
Niniejszy artykuł ma na celu przedstawienie sytuacji górnictwa w okręgu rybnickim – obecnych trudności i perspektyw związanych z jego rozwojem. Czytelnikowi prezentowane są dane statystyczne obrazujące relacje pomiędzy krajowym zapotrzebowaniem na energię uzyskiwaną w wyniku spalania węgla, a możliwościami wydobywczymi i sprzedażowymi rybnickich kopalń. Dokonano także krótkiej analizy dotyczącej przyczyn ogólnej małej rentowności śląskich zakładów wydobywczych. Artykuł ma na celu min. zwrócenie uwagi na perspektywy rozwoju górnictwa w Polsce, z wyróżnieniem obszarów działalności gospodarczej kopalń wymagających głębokiej i planowanej restrukturyzacji, z uwzględnieniem obecnych standardów ekonomicznych. Publikacja to także próba wskazania na poza wydobywczą działalność kopalń, które często angażują się na rzecz rozwoju przestrzeni lokalnej.
This article aims to present the situation in the mining district of Rybnik – the current difficulties and the prospects for its development. The reader is presented statistical data showing the relationship between the national demand for energy generated in the combustion of coal, and the possibilities of mining and sales Rybnik mines. There has also been a brief analysis of the reasons for the overall low profitability of the Silesian mines. Article aims to minimal draw attention to the prospects for the development of mining in Poland, with honors business areas that require deep mines and the planned restructuring, taking into account the current economic standards. The publication also attempt to indicate on the outside of mining activities mines that are often involved in the development of the local.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2016, 1 (13); 517-525
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Noise Variability in Underground Room and Pillar Coal Mines
Autorzy:
Szary, M. L.
Chugh, Y. P.
Hirschi, J.
Powiązania:
https://bibliotekanauki.pl/articles/90626.pdf
Data publikacji:
2011
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
underground noise control
noise measurements
noise-induced hearing loss
Opis:
Noise in an underground coal mine has dominant components generated mainly from 3 sources: (a) continuous mining machines, (b) roof bolters, and (c) cars/vehicles used to transport personnel and/or coal. Each of these 3 noise sources also has a number of well-defined sub-sources with their own noise characteristics. Sound level meters were used to collect noise data in the form of instantaneous readings and also to check calibration of other sound measuring instruments. The most useful information was obtained from a spectrum analysis of continuous digital recordings of noise over time. This paper discusses the variability or dynamics of generated noise in both frequency and time domains in relation to several independent variables related to coal extraction and transportation processes.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2011, 17, 3; 301-308
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation and risk factors of roadheaders in coal mines
Autorzy:
Škvareková, Erika
Tomašková, Marianna
Sabadka, Dušan
Šofranko, Marian
Zelenák, Štefan
Powiązania:
https://bibliotekanauki.pl/articles/1836626.pdf
Data publikacji:
2021
Wydawca:
STE GROUP
Tematy:
roadheader for coal mining
risk
safety
Opis:
During mechanical disintegration of the rock, for mining works are used also roadheaders. Roadheaders, in comparison with disintegration by blasting operations can without interuption, and works changes with one machine, dissolve, load and at the same time mine disintegrated rock. These electro-hydraulic machines cause no harmful vibrations and are ideal for mining coal and other soft rock minerals. Mechanical mining is safer, protects the rock environment, allows mining without further breaks, allows you to achieve a higher level of daily progress and also saves work. The analysis of occupational accidents in the Slovak Republic shows that it is necessary require from employees increased attention in any work activity and attention in the work performed (mainly work in handling material, objects and burdens). In the underground coal mines further attention needs to be paid to securing hazardous areas, it is necessary to proceed in such a way as to prevent as much as possible the fall of rock as much as possible Underground roads require modification and equipment in accordance with regulations. It is necessary to follow health and safety instructions mentioned in operating and maintenance documentation. Correction of some deficiencies is ordered by a decision of the Mining Office. Most measures are aimed at adhering to technological discipline, to complement operating documentation, to prevent rock falls, to equip some machinery and transport equipment, to work procedures for handling loads, to maintenance of mining works and for explosion and anti-vapor prevention. In this article, we assess the safety risks of two roadheaders for coal mining works in Slovak conditions. Pairwise comparisons of the criteria of selected roadheaders were used to determine the safety risks, as well as taking into account the risks and safety measures according to the mixed methods following to the standard.
Źródło:
Management Systems in Production Engineering; 2021, 3 (29); 242-250
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Continuous dust monitoring in headings in underground coal mines
Autorzy:
Lebecki, K.
Małachowski, M.
Sołtysiak, T.
Powiązania:
https://bibliotekanauki.pl/articles/92184.pdf
Data publikacji:
2016
Wydawca:
Główny Instytut Górnictwa
Tematy:
optical dust sensor
gravimetric dust sampler
laser diffraction
respirable dust
optyczny czujnik pyłu
pyłomierz grawimetryczny
dyfrakcja laserowa
pył respirabilny
Opis:
The article presents hazardous conditions of airborne dust based on the results of measurements of dust concentration taken at work-places at a underground rock-coal face drilled by a heading machine with combined ventilation (suction and forced ventilation with dust collector). The measurements were taken using three methods in order to examine and assess the actual conditions within the excavation subject to the study. The measurement results and conclusions show major difficulties in achieving MAC levels. Research conclusions indicate the low efficiency of collective and personal measures applied to protect against dust harmful to health as well as the need to improve them.
Źródło:
Journal of Sustainable Mining; 2016, 15, 4; 125-132
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of safety hazards in Indian underground coal mines
Autorzy:
Tripathy, D. P.
Ala, C. K.
Powiązania:
https://bibliotekanauki.pl/articles/92126.pdf
Data publikacji:
2018
Wydawca:
Główny Instytut Górnictwa
Tematy:
underground coal mining
hazard identification
risk assessment
safety control
accident analysis
górnictwo podziemne
identyfikacja zagrożenia
ocena ryzyka
kontrola bezpieczeństwa
analiza wypadków
Opis:
To improve safety the application of effective risk management has become a requirement in the mining industry. The effectiveness of mining risk management essentially depends on the risk assessment process, as the output of the risk assessment process helps the mine management to decide upon the control measures to be employed to mitigate the risks identified in the mine. The application of risk assessment in mines has become important not only for ensuring a safe working environment but, also, it is now a legal requirement. The capability of a risk assessment process depends on the hazard identification phase, as unidentified hazards may lead to unknown and unmanageable risks. Therefore, it is essential to identify all the potential hazards to manage the risks in mines. The object of this study is to identify the safety hazards present in Indian underground coal mines and to build a preliminary database of the identified hazards. Accident data collected from the Directorate General of Mines Safety in India and a public sector coal mining company was studied to identify safety hazards that may probably lead to accidents. The database could help the mine management to improve decision making after analysing and evaluating the safety risks of identified hazards.
Źródło:
Journal of Sustainable Mining; 2018, 17, 4; 175-183
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Productivity improvement in underground coal mines – a case study
Autorzy:
Mishra, D. P.
Sugla, M.
Singha, P.
Powiązania:
https://bibliotekanauki.pl/articles/91911.pdf
Data publikacji:
2013
Wydawca:
Główny Instytut Górnictwa
Tematy:
production improvement
lean manufacturing
underground coal mine
side discharge loader
SDL
lead distance
doskonalenie produkcji
Lean Manufacturing
podziemna kopalnia węgla
ładowarka bocznie wysypująca
Opis:
Improvement of productivity has become an important goal for today’s coal industry in the race to increase price competitiveness. The challenge now lying ahead for the coal industry is to identify areas of waste, meet the market price and maintain a healthy profit. The only way to achieve this is to reduce production costs by improving productivity, efficiency and the effectiveness of the equipment. This paper aims to identify the various factors and problems affecting the productivity of underground coal mines adopting the bord and pillar method of mining and to propose suitable measures for improving them. The various key factors affecting productivity, namely the cycle of operations, manpower deployment, machine efficiency, material handling and management of manpower are discussed. In addition, the problem of side discharge loader (SDL) cable handling resulting in the wastage of precious manpower resources and SDL breakdown have also been identified and resolved in this paper.
Źródło:
Journal of Sustainable Mining; 2013, 12, 3; 48-53
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodology of estimation of methane emissions from coal mines in Poland
Autorzy:
Patyńska, R.
Powiązania:
https://bibliotekanauki.pl/articles/178566.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
methane emission
statistical analysis
coal mine
emisja metanu
analiza statystyczna
kopalnia węgla
Opis:
Based on a literature review concerning methane emissions in Poland, it was stated in 2009 that the National Greenhouse Inventory 2007 [13] was published. It was prepared firstly to meet Poland’s obligations resulting from point 3.1 Decision no. 280/2004/WE of the European Parliament and of the Council of 11 February 2004, concerning a mechanism for monitoring community greenhouse gas emissions and for implementing the Kyoto Protocol and secondly, for the United Nations Framework Convention on Climate Change (UNFCCC) and Kyoto Protocol. The National Greenhouse Inventory states that there are no detailed data concerning methane emissions in collieries in the Polish mining industry. That is why the methane emission in the methane coal mines of Górnośląskie Zagłębie Węglowe – GZW (Upper Silesian Coal Basin – USCB) in Poland was meticulously studied and evaluated. The applied methodology for estimating methane emission from the GZW coal mining system was used for the four basic sources of its emission. Methane emission during the mining and post-mining process. Such an approach resulted from the IPCC guidelines of 2006 [10]. Updating the proposed methods (IPCC2006) of estimating the methane emissions of hard coal mines (active and abandoned ones) in Poland, assumes that the methane emission factor (EF) is calculated based on methane coal mine output and actual values of absolute methane content. The result of verifying the method of estimating methane emission during the mining process for Polish coal mines is the equation of methane emission factor EF.
Źródło:
Studia Geotechnica et Mechanica; 2014, 36, 1; 89-101
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Dust Levels in Different Areas of Underground Coal Mines
Autorzy:
Onder, M.
Onder, S.
Akdag, T.
Ozgun, F.
Powiązania:
https://bibliotekanauki.pl/articles/90774.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
dust
underground mining
Opis:
Dust concentration levels in underground coal mines are of primary importance and have to be controlled to prevent pulmonary disease in miners. Different mining areas are exposed to different dust levels and to minimize the probability of occupational respiratory disease of coal miners, it is necessary to evaluate dust concentration in the different working areas. This study aimed to evaluate dust concentration levels in different areas of underground coal mines. Data obtained from the measurements in 1978–2006 were evaluated with the analysis of variance (ANOVA) and the Tukey-Kramer procedure. It was concluded that production areas had higher dust concentration levels; thus, production workers may have respiratory disorders related to exposure to coal dust in their work environment.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 1; 125-130
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biodeteriogenne grzyby w kopalniach węgla kamiennego
Biodeteriogenic moulds in coal mines
Autorzy:
Piontek, M.
Bednar, K.
Powiązania:
https://bibliotekanauki.pl/articles/372213.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
organizm biodeteriogenny
grzyb pleśniowy
kopalnia
węgiel kamienny
biodeteriogenic organisms
mould
coal mine
Opis:
Badania nad występowaniem grzybów, w tym grzybów pleśniowych w kopalniach są prowadzone od wielu lat. Grzyby pleśniowe jak i inne biodeteriogenne organizmy rozwijają się na każdym rodzaju materiału stosowanego w wyrobiskach górniczych, dlatego szkody wyrządzone przez nie są nie do uniknięcia. W kopalniach węgla kamiennego wzrostowi mikroorganizmów sprzyja mikroklimat kopalni, specyficzne warunki środowiskowe, zarówno wysoka wilgotność względna powietrza jak i temperatura. Organizmy te porastają drewno, materiały izolacyjne przewodów elektrycznych, urządzenia elektryczne, mogą uszkadzać taśmy przenośnikowe, a także występują w emulsjach olejowo-wodnych stosowanych do układów hydraulicznych w kopalniach. Poza tym grzyby pleśniowe mogą stwarzać zagrożenie dla zdrowia osób pracujących w kopalniach.
Studies on the prevalence of fungi, including moulds in the mines are done for many years. Moulds and other biodeteriogenic organisms develop on any type of material used in excavations, because the damage caused by these are not inevitable. In coal mines the growth of microorganism favour micoclimate of the mine, specific environmental conditions, both high relative humidity and temperature. These organisms grow on wood, insulation materials for electrical wiring, electrical equipment, can damage the conveyor, and also occur in the oil - water emulsions used in the hydraulic systems in the mines. In addition, moulds can cause health risks of people working in the mines.
Źródło:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2010, 138 (18); 57-64
1895-7323
Pojawia się w:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Scale of Methane Hazard in Polish Hard Coal Mines
Autorzy:
Tutak, M.
Powiązania:
https://bibliotekanauki.pl/articles/2064941.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
coal mine
methane emission
cluster analysis
hazard
environmental
Opis:
In the majority of Polish mines, the exploitation of hard coal is accompanied by the release of considerable amounts of methane. Being flammable and explosive, methane may form an explosive mixture with air once it appears in mine workings. For this reason, the methane hazard is recognised as one of the ventilation risks in the mining industry. This process leads to the formation of air and methane mixture, whose considerable amounts permeate into the atmosphere and the natural environment. This phenomenon is extremely unfavourable because methane is, besides carbon dioxide, yet another gas that exacerbates the greenhouse effect. For this reason, it is increasingly more common to equip mines with methane collection systems in the process of demethylation. These play a vital role for both the natural environment and the safety of work in mines. A reduction of the methane content in headings increases the safety of the working crew and enhances the effectiveness of mining production. The article presents an analysis of the methane-related hazard based on methane emissions during mining exploitation. The analysis was based on the data concerning the amount of methane emitted into the atmosphere and collected by methane extraction systems from 16 coal mines. It led to identification of homogenous mines with similar values of the absolute methane-bearing capacity and ventilation methane-bearing capacity as well as with similar amounts of methane collected by methane extraction systems. The analysis was performed using the non-hierarchical k-average method, which belongs to the group of algorithms for analysing clusters. As a result, the mines were divided into the assumed number of groups. The results obtained made it possible to determine a group of mines in which, in the Author’s opinion, similar systems can be applied for controlling and reducing the methane hazard. These results also open up numerous possibilities for undertaking joint business ventures by the mines in terms of using the collected methane and implementing preventive measures.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 801--807
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The technology of drilling wells for capturing methane from abandoned coal mines
Autorzy:
Siemek, Jakub
Macuda, Jan
Łukańko, Łukasz
Hendel, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/218949.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wiercenie
młot udarowy
metan
casing-while-drilling
down-the-hole-hammer
post-extraction gobs
methane capturing
drillability test
Opis:
The longwall mining system with fall of the roof is still the most common hard coal extraction system in Polish mining. Its utilization for selective coal seams’ mining results in the development of post-extraction gobs at different depths. Methane desorption phenomena from the coal seams in the stress release zones and migration of gas towards the area of operations, result in methane accumulating also after completion of coal exploitation. Methane which is not exploited from the gobs can migrate directly to the atmosphere e.g. through overlying layers, faults, workings or directly via an operated ventilation grid of an adjacent coal mine – contributing to the Greenhouse Gas effect. One of the methods to capture methane (Abandoned Maine Methane) from abandoned coal mines is to drill vertical wells through several post-extraction gobs from the surface. This paper presents the results of drilling operations at the AGH-Wieczorek-1 well, where first time in Poland, down-the-hole-hammer (DTH) with casing-while-drilling (CwD) technology were used to drill through several post-extraction gobs. The AGH-Wieczorek-1 well with 440.0 m MD was successfully drilled without any complications. Finally, three post-extraction gobs and two coal seams were drilled. Additionally, results from drillability tests, which were performed during drilling operations, are presented.
Źródło:
Archives of Mining Sciences; 2020, 65, 1; 89-101
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 328

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