Temat: mines - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The presence and dosimetry of radon and thoron in a historical, underground metalliferous mine
Autorzy:: Kleinschmidt, R.
Watson, D.
Janik, M.
Gillmore, G.
Powiązania:: https://bibliotekanauki.pl/articles/92202.pdf
Data publikacji:: 2018
Wydawca:: Główny Instytut Górnictwa
Tematy:: radon
thoron
progeny
mines
dose
NORM
toron
potomstwo
kopalnie
dawka
Opis:: A combination of long term passive, and short term active radon-222, radon-220 and respective progeny measurements were conducted in both traverse and longitudinal axes of a historical metalliferous underground mine in North Queensland, Australia. While the passive monitor results provided average radon and thoron air concentrations over periods of 70-90 days, active measurements over a four day period provided significantly more detail into the dynamics of radon and progeny concentrations in the naturally ventilated mine environment. Passive monitor concentrations for radon and thoron ranged between 60 and 390 Bq m^-3 (mean: 140 ±55 Bq m^-3) and 140 and 2600 Bq m^-3 (mean: 1070 ±510 Bq m^-3) respectively, with passive thoron progeny monitors providing a mean concentration of 9 ±5 Bq m^-3EEC. Active measurement mean concentrations for radon, thoron, radon progeny and thoron progeny in the centre of the mine drive were 130 ±90 Bq m^-3, 300 ±100 Bq m^-3, 20 ±20 Bq m^-3EEC and 10 ±10 Bq m^-3EEC respectively. It was identified that thoron passive detector placement is critical in establishing reliable monitoring data, and is the reason for the discrepancy between the active and passive thoron results in this study. Site specific progeny measurements are required for the accurate estimation of dose to persons entering the mine. Based on short term active measurements and passive thoron progeny monitor results, the dose contribution from thoron and progeny in the mine was observed to contribute up to 80% of the total radon/thoron inhalation dose, and therefore should not be underestimated in monitoring programs under similar conditions.
Źródło:: Journal of Sustainable Mining; 2018, 17, 3; 120-130
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Tests of methane desorption and emission from samples of hard coal in the context of mine closures through flooding
Autorzy:: Krause, Eugeniusz
Karbownik, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/1839015.pdf
Data publikacji:: 2019
Wydawca:: Główny Instytut Górnictwa
Tematy:: methane hazard
closing mines
flooding mines
methane emission
safety
underground mining
zagrożenie metanowe
zamykanie kopalni
zalewanie kopalni
emisja metanu
bezpieczeństwo
górnictwo podziemne
Opis:: Forecasts of methane emissions during and after flooding a closed gassy hard coal mine and the evaluation of possible methane migration to the surface in post-mining areas, after cutting off the vertical ventilation workings of hard coal mines from the surface, provide valuable information which can help to ensure public safety. This article presents research into the influence of changes in the hydrostatic pressure of a water column in a flooded mine on the volume of methane emission and migration from hard coal seams, during and after the flooding of a closed mine. The tests were conducted based on a modified research method developed by the French National Institute for Industrial Environment and Risks (INERIS), France, and the Central Mining Institute (GIG), Katowice, Poland. A test stand for gas desorption and autoclaves for emissions, under controlled pressure and temperature, were used. The tests were conducted and changes in pressure in the autoclaves over time were observed. The observations led to the conclusion that water inhibits methane desorption and emission from coal to varying extents, depending on the hydrostatic pressure exerted. Based on the conducted tests, developed a model of methane emission into flooded goafs was developed. A method of determining index k2 was also developed, which lowers the forecast volume of methane emission into goafs depending on the value of the hydrostatic pressure of the water column and the level of submersion. Results of the tests form the basis to calculate forecasts in the developed model of methane emission into the goafs of a mine during its closure, which, as a consequence, enables the identification of the level of methane hazard and the selection of preventive measures aimed at combating methane hazard during and after the closure of a gassy mine.
Źródło:: Journal of Sustainable Mining; 2019, 18, 3; 127-133
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Seismic activity and flooding of hard coal mines in the Ostrava-Karvina Coalfield
Autorzy:: Konicek, Petr
Jirankova, Eva
Kajzar, Vlastimil
Schreiber, Jan
Malucha, Pavel
Schuchova, Kristyna
Powiązania:: https://bibliotekanauki.pl/articles/2201417.pdf
Data publikacji:: 2022
Wydawca:: Główny Instytut Górnictwa
Tematy:: flooding of mines
post-mining seismicity
coal mines
water level
ground surface movement
zalewanie kopalni
sejsmiczność pogórnicza
kopalnie węgla kamiennego
poziom wody
ruch powierzchni ziemi
Opis:: The termination of mining activities often results in post-mining problems and risks. One of these issues is the flooding of mines. Long-term mining in the Ostrava and Petrvald sub-basins in the Upper Silesian Coal Basin finished in 1994. Tens of coal seams were mined here, and the depth of mining reached more than 1000 m below the surface. Flooding of the Ostrava sub-basin started in 1994. The Ostrava and Petrvald sub-basins were flooded from one half only to prevent water from flooding into the Karvina sub-basin, where mining continued. The continual pumping of water has been carried out ever since. Only low-energy seismic events (up to 103 J) were recorded during the periods of flooding and water pumping. Only one high-energy seismic event was recorded here (108 J, magnitude of 3.5, 12 December 2017). This study presents the natural and mining conditions regarding the process of mine flooding; and the induced seismicity registered during the flooding of mines and the preservation of water at the stated level. Analysis of the flooding of mines in connection to the registered seismicity is presented. Probable reasons for the low seismic activity during the flooding of mines are also discussed.
Źródło:: Journal of Sustainable Mining; 2022, 21, 4; 249--260
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Natural radionuclides (NORM) in a Moroccan river affected by former conventional metal mining activities
Autorzy:: Manjón, Guillermo
Mantero, Juan
Vioque, Ignacio
Díaz-Francés, Inmaculada
Galván, José Antonio
Chakiri, Said
Choukri, Abdelmajid
García-Tenorio, Rafael
Powiązania:: https://bibliotekanauki.pl/articles/92188.pdf
Data publikacji:: 2019
Wydawca:: Główny Instytut Górnictwa
Tematy:: NORM
naturally occuring radioactive materials
abandoned mines
Moulouya river
Morocco
naturalne źródła promieniowania
opuszczona kopalnia
rzeka Moulouya
Maroko
Opis:: The main aim of this work was to determine the levels of multiple natural radionuclides in an aquatic system (Moulouya river, Morocco) impacted by multiple abandoned Zinc and Lead mines. 238U, 234U, 232Th, 230Th and 210Po were determined by alpha-particle spectrometry in water and sediment samples collected along the river and in samples from three pit lakes of abandoned mines, located in the Upper Moulouya catchment area. The results enabled the analysis of the different levels of impact of former mining activities, depending on the natural radionuclides. While the activity concentration of U-isotopes in Moulouya river water was slightly elevated in the vicinity of abandoned mine wastes, other natural radionuclides (Th-isotopes and 210Po) levels were typical of a natural environment. This fact is clearly reflected in the magnitude and range observed in the distribution coefficients for the different radionuclides analyzed.
Źródło:: Journal of Sustainable Mining; 2019, 18, 1; 45-51
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Investigations on methane emission from flooded workings of closed coal mines
Badania emisji metanu ze zlikwidowanych zatopionych kopalń węgla kamiennego
Autorzy:: Krause, E.
Pokryszka, Z.
Powiązania:: https://bibliotekanauki.pl/articles/1342807.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: methane desorption
flooded mines
closed mines
desorpcja metanu
zatapianie kopalń
likwidacja kopalń
Opis:: The migration of methane towards the surface, within mining areas of closed mines, can be a danger to public safety for many of years after the process of liquidation has been finished. The liberation of methane from undisturbed coal seams, and those destressed through earlier mining has not been fully recognised so far. Knowledge of the effect of the presence of water, along with hydrostatic pressure, on the intensity of methane desorption from destressed seams is necessary in determining the approximate volume of methane inflowing, within a period of time, into a closed mine. Laboratory tests on these relationships have been carried out in accordance with proper research methodology by the National Institute for the Environment and Industrial Hazards (INERIS), France with the Central Mining Institute, Katowice, Poland. The results have facilitated determining the effect of hydrostatic pressure variation of water on the intensity of methane desorption from flooded coal. These results has been practically applied in predicting the emission of methane into closed mines, and in orienting the rules of methane hazard control, both during the process of mine closure, and on the surface of post-mining areas.
Migracja metanu w kierunku powierzchni, w granicach obszarów górniczych zlikwidowanych kopalń, może stanowić zagrożenie dla bezpieczeństwa publicznego przez wiele lat od czasu zakończenia likwidacji. Wydzielanie się metanu z nienaruszonych pokładów węgla i pokładów odprężonych prowadzoną wcześniej eksploatacją, nie jest dotychczas w pełni rozpoznane. Znajomość wpływu obecności wody oraz związanego z nią ciśnienia hydrostatycznego na intensywność desorpcji metanu z pokładów odprężonych, jest niezbędna do określenia szacunkowej ilości metanu dopływającego w przedziale czasu do zlikwidowanej kopalni. Badania laboratoryjne tych zależności przeprowadzone zostały w oparciu o metodykę badawczą opracowaną przez Państwowy Instytut Środowiska i Zagrożeń Przemysłowych (INERIS) we Francji, wspólnie z Głównym Instytutem Górnictwa w Katowicach. Wyniki badań pozwoliły na określenie wpływu zmian ciśnienia hydrostatycznego słupa wody na intensywność desorpcji metanu z węgla, co znalazło praktyczne zastosowanie w prognozowaniu wydzielania się metanu do zlikwidowanych kopalń i pozwoliło na odpowiednie ukierunkowanie profilaktyki zagrożenia metanowego podczas likwidacji kopalni oraz na powierzchni terenów pogórniczych.
Źródło:: Journal of Sustainable Mining; 2013, 12, 2; 40-45
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Fundamental understanding of diesel-operated man riding vehicle DPM dispersion - a case study
Autorzy:: Morla, R.
Godbole, A.
Karekal, S.
Bhattacharjee, R. M.
Balasubrahmanyam, N.
Powiązania:: https://bibliotekanauki.pl/articles/91999.pdf
Data publikacji:: 2018
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal mines
DPM
diesel-powered man riding vehicle
kopalnie węgla
pojazd z silnikiem Diesla
Opis:: In this paper, an attempt has been made to model DPM flow patterns in the vicinity of man riding vehicle(s) operating in a coal mine environment. The DPM flow patterns are modelled using the techniques of computational fluid dynamics (CFD) and validated using field experimental measurements. The models show that if the vehicle is stationary, DPM particles are dispersed towards the center of gallery. Beyond 20m downstream of the vehicle, the DPM particles occupy the entire cross-section of the roadway. If movement of the vehicle is considered, the miners may be exposed to a high concentration of DPM due to the engines running at full capacity and the resultant air flow induced by the movement of the vehicle.
Źródło:: Journal of Sustainable Mining; 2018, 17, 3; 105-110
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Addressing specific safety and occupational health challenges for the Canadian mines located in remote areas where extreme weather conditions dominate
Autorzy:: Halabi, Rachid
Kumral, Mustafa
Powiązania:: https://bibliotekanauki.pl/articles/2201407.pdf
Data publikacji:: 2022
Wydawca:: Główny Instytut Górnictwa
Tematy:: mine safety
remote mine sites
extremely weather conditions
health and safety legislation frameworks
mines in the Canadian North
bezpieczeństwo w kopalniach
odległe kopalnie
ekstremalne warunki pogodowe
ramy prawne dotyczące zdrowia i bezpieczeństwa
kopalnie na północy Kanady
Opis:: The number of mining operations is increasing in the Canadian North, where extreme weather conditions govern. Currently, many mine development projects are also in progress in this region. These mines’ working atmosphere and employment circumstances are highly different from regular mines. One of the main differences is the special safety issues of the Canadian North. The primary sources of these special issues are: the difficulty of finding skilled employees; high employee turnover rate; insufficient training and certification requirements; delicate employment circumstances affecting the psychological well-being of employees; permafrost; mine inspection challenges; inventory and logistic hardship; and the legislative and regulative necessities corresponding to the particular working environment. This paper aims to set forth specific safety cases in the mines located in the Canadian North. Then, it argues the characteristics of safety organizations and management required to deal with these cases. Furthermore, how the current frameworks can be improved is discussed. Safety issues stemming from cold weather conditions and location remoteness of mines add further challenges to the viability and implementation of projects. The paper underlines that mining operations need certain safety organizations, management approaches, and specific regulations for the mines operated in remote areas and under severe weather conditions.
Źródło:: Journal of Sustainable Mining; 2022, 21, 3; 180--190
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Accident analysis of mining industry in the United States - a retrospective study for 36 years
Autorzy:: Rahimi, Elham
Shekarian, Younes
Shekarian, Naser
Roghanchi, Pedram
Powiązania:: https://bibliotekanauki.pl/articles/2201377.pdf
Data publikacji:: 2022
Wydawca:: Główny Instytut Górnictwa
Tematy:: mines
accident
statistical analysis
generalized estimation equation
GEE
kopalnie
wypadek
analiza statystyczna
uogólnione równanie estymacji
Opis:: A retrospective study on accident analysis of the United States mines for 36 years was achieved using statistical analysis on the MSHA's accident databases between 1983 and 2018. A regression model of generalized estimation equation (GEE) was used for unbalanced panel data that provided 95,812 observations for 19,924 mine-ID-year in aggregate, coal, metal, and non-metal mines. The contributions of various parameters, including mine type, injured body part, days lost, age, and experience on the rate of accidents and injuries were investigated across the commodity types. The results showed coal miners in the East region are at a higher risk of accident. The results of regression analysis show that mine-tenured workers have a vital role in accident frequencies. Analysis of the injured body part on the injury rate indicates that the upper body injuries are the most significant among all mine types. Also, the fatality rate is significant in aggregate, and coal mines in comparison with metal and non-metal mines.
Źródło:: Journal of Sustainable Mining; 2022, 21, 1; 27--44
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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