Abstract
The study is devoted to the methane hazard in hard coal mining. This hazard occurs in almost every coalfield in the world. Ensuring maximum work safety under methane hazard conditions is based, among other things, on reliable, fast and frequent determinations of methane content in a coal seam. The existing methods are time-consuming, and determinations must be performed in laboratories. Indirect methods such as desorbometric methods are burdened with high measurement uncertainties. The study presents a model of methane release from granular coal samples and a device (AMER) developed for measuring methane content in a coal seam under in situ conditions. Measurements are performed in a fully automatic way and preliminary results, based on the approximation of the Crank model, are available within several dozen minutes from the beginning of the measurement. Also, the use of the unipore diffusion equation and a proper software of the device allowed to determine the values of the effective diffusion coefficient. Results of measurements performed with the AMER desorbometer are highly consistent with the results of the measurements performed in the laboratory using a traditional method.
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Kędzior, S. and Jelonek, I., Reservoir Parameters and Maceral Composition of Coal in Different Carboniferous Lithostratigraphical Series of the Upper Silesian Coal Basin, Poland, Int. J. of Coal Geology, 2013, vol. 111, pp. 98–105.
Dubiński, J. and Turek, M., Szanse i zagrożenia rozwoju górnictwa węgla kamiennego w Polsce (Opportunities and Threats of Coal Mining in Poland), Wiadomości Górnicze, 2012, no. 11, pp. 626–633.
State Mining Authority. Ocena stanu bezpieczeństwa pracy, ratownictwa górniczego oraz bezpieczenństwa powszechnego w związku z działalnością górniczo-geologiczną w 2014 roku (Evaluation of the Safety, Mine Rescue and Public Safety in Relation with the Activities of Mining and Geology in 2014), Katowice, 2015.
Odintsev, V.N., Sudden Outburst of Coal and Gas—Failure of Natural Coal as a Solution of Methane in a Solid Substance, J. Min. Sci., 1997, vol. 33, no. 6, pp. 508–516.
Kiryaeva, T.A., Evaluation of Methane Resources in Kuzbass in the Context of New Ideas on Methane Occurrence in Coal Beds, J. Min. Sci., 2012, vol. 48, no. 5, pp. 825–831.
Szlązak, N., Borowski, M., and Korzec, M., Określenie metanonośności pokładów węgla na podstawie pomiarów wskaźnika desorpcji dla południowej częsści Górnośląskiego Zagłębia Węglowego, Materiały konferencyjne XX Szkoły Eksploatacji Podziemnej, 2011.
Orzechowska-Zięba, A. and Nodzeński, A., Sorption Capacity of Hard Coals with Respect to C6 to C8 Hydrocarbons, Gospodarka Surowcami Mineralnymi—Mineral Resources Management, 2008, vol. 24, no. 3/3, pp. 245–254.
Skoczylas, N., Coal Seam Methane Pressure as a Parameter Determining the Level of the Outburst Risk–Laboratory and In-Situ Research, Archives of Mining Sciences, 2012, vol. 57, no. 4, pp. 861–869.
Nazarova, L.A., Nazarov, L.A., Polevshchikov, G.Ya., and Rodin, R.I., Inverse Problem Solution for Estimating Gas Content and Gas Diffusion Coefficient of Coal, J. Min. Sci., 2012, vol. 48, no. 5, pp. 781–788.
Crank, J., Mathematics of Diffusion, Oxford University Press, London, 1956.
Timofeev, D. Adsorption Kinetics, Izd. Akad. Nauk, 1962.
Kudasik, M., The Manometric Sorptomat—An Innovative Volumetric Instrument for Sorption Measurements Performed under Isobaric Conditions, Measurement Science and Technology, 2016, vol. 27, no. 3, 035903.
Skoczylas, N., Kudasik, M., Topolnicki, J., Oleszko, K., and Młynarczuk, M., Model Studies on Saturation of a Coal Sorbent with Gas Taking into Account the Geometry of Spatial Grains, Przemysłl Chemiczny—Chemical Industry, 2018, vol. 92, no 2, pp. 272–276.
Tailakov, O.V., Kormin, A.N., and Tailakov, V.O., Assessment of Residual Gas Content in Coal Seams in Terms of Macrokinetic Desorption Filtration Processes and Methane Diffusion for Evaluation of Degassing Efficiency, Nauka Tekh. Gaz. Promyshl., 2014, no. 1, pp. 10–13.
Tailakov, O.V., Zastrelov, D.N., Kormin, A.N., and Utkaev, E.A., Determination of Gas-Bearing Capacity of Coal Banks Based on the Study of Methane Filtration and Diffusion Processes, Ugol’, 2015, no. 1, pp. 74–77.
Diamond, W.P. and Schatzel, S.J., Measuring the Gas Content of Coal: A Review, Int. J. of Coal Geology, 1998, vol. 35, pp. 311–331.
Szlązak, N. and Korzec, M., Method for Determining the Coalbed Methane Content with Determination the Uncertainty of Measurements, Archives of Mining Sciences, 2016, vol. 61, no. 2, pp. 443–456.
Kudasik, M., Results of Comparative Sorption Studies of the Coal-Methane System Carried out by Means of an Original Volumetric Device and a Reference Gravimetric Instrument, Adsorption, 2017, vol. 23, no. 4, pp. 613–626.
Kissell, F.N., McCulloch, C.M., and Elder, C.H., The Direct Method of Determining Methane Content of Coalbeds for Ventilation Design, US Bur. Mines, Rep. Invest., 1973, RI 7767.
Polish Standard PN G-44200:2013. Mining—Determining of Methane Content in Coal Seams—Drilling Method, 2013.
Paul, K., Fruherkennen und Verhindern von Gasausbruchen, Glukauf, 1977, no. 1–13, pp. 656–662.
Janas, H., Improved Method for Assessing the Risk of Gas and Coal Outbursts, Second Int. Mine Ventilation Congress. Reno NV, USA, 1979, no. 4–8, pp. 372–377.
Lama, R.D. and Bodziony, J., Outbursts of Gas, Coal and Rock in Underground Coal Mines, R.D. Lama & Associates, Wollongong, NSW, Australia, 1996.
Stączek, A. and Simka, A., Graniczny wskaźnik intensywności desorpcji gazu z wągla jako podstawowy parametr zagrożenia wyrzutowego charakteryzujący stopień nasycenia gazem pokładów węgla, Mechanizacja i Automatyzacja Górnictwa, 2004, vol. 42, no. 12.
Skoczylas, N., Dutka, B., and Sobczyk, J., Mechanical and Gaseous Properties of Coal Briquettes in Terms of Outburst Risk, Fuel, 2014, vol. 134, no. 15, pp. 45–52.
Zhao, Y., Feng, Y., and Zhang, X., Molecular Simulation of CO2/CH4 Self- and Transport Diffusion Coefficients in Coal, Fuel, 2016, vol. 165, no. 1, pp. 19–27.
Skoczylas, N. and Topolnicki, J., The Coal-Gas System—The Effective Diffusion Coefficient, Int. J. of Oil, Gas and Coal Technology, 2016, vol. 12, no. 4, pp. 412–424.
Skoczylas, N. and Wierzbicki, M., Evaluation and Management of the Gas and Rock Outburst Hazard in the Light of International Legal Regulations, Archives of Mining Sciences, 2014, vol. 59, no. 4, pp. 1119–1129.
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Skoczylas, N., Wierzbicki, M. & Kudasik, M. A Simple Method for Measuring Basic Parameters of the Coal—Methane System under Mining Conditions. J Min Sci 54, 522–533 (2018). https://doi.org/10.1134/S1062739118033953
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DOI: https://doi.org/10.1134/S1062739118033953