Prognosticating fire hazards in goafs in Polish collieries

• Autorzy: Zarębska K. , Baran P. , Cygankiewicz J. , Dudzińska A.
• Języki publikacji: EN

Abstrakty

EN

The purpose of the study is to determine the sorption capacity of hard coals from Polish collieries with respect to several sorbets: ethane, ethylene, propane, propylene. The knowledge of the sorption capacity of coal with respect to a wide range of sorbates is essential to ensure the miners' safety and to allow for reliable forecasting fire hazard and self-heating of coal. The self-heating process is evaluated using specialist indicators based on hydrocarbon contents in mine air. Coal properties, such as porosity, coal rank, maceral content, moisture, ash and volatile matter contents as well as proportion of mineral substances are of key importance for understanding the processes taking place on the hard coal-gas interface. The quantitative analysis of these parameters supported by sorption tests will provide us information about the coal's structure's tendency to accumulate and release gases and vapours. It is important to determine the accessibility of the internal coal structure to gases and to investigate the influence of the micro- and submicro-porosity on the process of sorption. Concentrations of non-saturated hydrocarbons: ethylene and propylene are good indicators used to evaluate the scale of the self-heating process. Therefore, we need to reliably establish whether hydrocarbons present in mine air are released only through the self-heating process or whether they can be also accumulated in the coal structure and then desorbed when the conditions should change. Although preventive measures have been put place in Polish collieries, endogenous fire are still fairly frequent, so the hazard control based only on concentrations of non-saturated hydrocarbons may prove insufficient. It is also necessary to determine whether those hydrocarbons can be accumulated in coal, what factors will trigger this process and in what extent. Results of such tests will contribute to fire prevention and will help control other hazards associated with underground mining operations.

Słowa kluczowe

EN

gas; coal; sorption; self-heating process

• Wydawca: AGH University of Science and Technology Press
• Czasopismo: AGH Drilling, Oil, Gas
• Rocznik: 2012
• Tom: Vol. 29, no. 4
• Strony: 463--478
• Opis fizyczny: Bibliogr. 17 poz., tab., wykr.

Twórcy

autor

Zarębska K.

• AGH University of Science and Technology, Faculty of Fuels and Energy, Krakow, Poland

autor

Baran P.

• AGH University of Science and Technology, Faculty of Fuels and Energy, Krakow, Poland

autor

Cygankiewicz J.

• Central Mining Institute, Department of Mining Aerology, Katowice, Poland

autor

Dudzińska A.

• Central Mining Institute, Department of Mining Aerology, Katowice, Poland

Bibliografia

• [1] Barker C.E., Dallegge T.: Secondary gas emissions during coal desorption. Marathon Grassim Oskolkoff-1 Well, Cook Inlet Basin, Alaska: implications for resource assessment. Bulletin of Canadian Petroleum Geology, vol. 54, 3, 2006, pp. 273-291.
• [2] Beamish B.B., Crosdale P.J.: Instantaneous outbursts in underground coal mines: an overview and association with coal type. International Journal of Coal Geology, vol. 35, 1998, pp. 27-55.
• [3] Cao Y., He D.: Coal and gas outbursts in footwalls of reverse faults. Journal of Coal Geology, vol. 48, 2001, pp. 47-63.
• [4] Davidi S.H., Grossman S.L., Cohen H.: Organic volatiles emission accompanying the low temperature atmospheric storage of bituminous coal. Fuel, vol. 74, 1995, pp. 1357-1361.
• [5] Diaz Aguado M.B., Nicieza C.G.: Control and prevention of gas outbursts in coal mines, Riosa-Olloniego coalfield. Spain. International Journal of Coal Geology, vol. 69, 2007, pp. 253-266.
• [6] Gentzis T., Deisman N., Chalaturnyk R.J.: Geomechanical properties and permeability of coals from Foothills and Mountain regions of western Canada. International Journal of Coal Geology, vol. 69, 2007, pp. 153-164.
• [7] Majewska Z., Ziętek J.: Changes of acoustic emission and strain in during gas sorption-desorption cycles. International Journal of Coal Geology, vol. 70, 2007, pp. 305-312.
• [8] Medek J., Weishauptova Z., Kovar L.: Combined isotherm of adsorption and absorption on coal and differentiation of both processes. Microporous and Mesoporous Materials, vol. 89, issues 1-3, 2006, pp. 276-283.
• [9] Misiak J.: Petrography and depositional environment of the no. 308 coal seam (Upper Silesian Coal Basin, Poland) - a new approachquantification and facies analysis. International Journal of Coal Geology, vol. 68, 2006, pp. 117-126.
• [10] Otuonye F., Sheng J.: A numerical simulation of gas flow during coal/gas outbursts. Geotechnical and Geological Engineerin, vol. 12 , no. 1, 1994, pp. 15-34.
• [11] Pan Z., Connell L.D.: A theoretical model for gas adsorption-induced coal swelling. International Journal of Coal Geology, vol. 69, 2007, pp. 243-252.
• [12] Rao M.B.: Diffusion through carbon micropores - 4 years later. Carbon, vol. 29, 1991, pp. 813-815.
• [13] Saunders J.T., Benjamin M.C., Yang T., Yang R.T.: Adsorption of gases on coals and heat-treated coals at elevated temperature and pressure. 2. Adsorption from hydrogen-methane mixtures. Fuel, vol. 64, 1985, pp. 621-626.
• [14] Urbiez A., El Bakali A., Pauwels J.F., Rida A., Meunier P.: Experimental study of a low pressure stoichiometric premixed methane, methane/ethane, methane/ethane/ propane and synthetic natural gas flames. Fuel, vol. 83, 2004, pp. 933-941.
• [15] Wang H., Dlugogorski B.Z., Kennedy E.M.: Coal oxidation at low temperatures: oxygen consumption,oxidation products, reaction mechanism and kinetic modelling. Progress in Energy and Combustion Science, vol. 29, 2003, pp. 487-513.
• [16] Webley P.A., Todd R.S.: Kinetics of Mixed Adsorbent Systems in Gas-Solid Adsorption. Adsorption Science & Technology, vol. 21, 2003, pp. 9-34.
• [17] Yang R., Saunders J.T.: Adsorption of gases on coals and heat-treated coals at elevated temperature and pressure. 1. Adsorption from hydrogen and methane as single gases. Fuel, vol. 64, 1985, pp. 616-620.