Mineev S.P., Dyakun I.L., Yashchenko I.A. The influence of volatile substance release on determining coal dust explosiveness
- Details
- Parent Category: Geo-Technical Mechanics, 2018
- Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 142
Geoteh. meh. 2018, 142, 45-52
https://doi.org/10.15407/geotm2018.142.045THE INFLUENCE OF volatile substance RELEASE ON DETERMININGCOAL dust EXPLOSIVENESS
Mineev S.P., Dyakun I.L., Yashchenko I.A.
Аuthors:
Mineev S.P., Doctor of Technical Science (D. Sh), Professor (IGTM, NAS of Ukraine)
Dyakun I.L., Candidate of Technical Science (Ph. D), Senior Researcher (IGTM, NAS of Ukraine)
Yaschenko I.O., Candidate of Technical Science (Ph. D) (IGTM, NAS of Ukraine)
UDC 622.814:622.411.52
Language: Ukrainian
Annotation.
Annually, accidents occur in the mines of Ukraine, which are related to explosions of methane-air mixture and coal dust. As a result of intensification of technological process of the coal mining, as well as during the stopping operations and roadway preparation in the deep horizons, sharp growth of dust and gas content is observed in the mines, which increases risk of explosions. The explosion of coal dust is determined by the physical and chemical properties of the mine layer being developed and the mining conditions under which explosion may occur.It is shown that one of the main factors characterizing proneness of dust to explode is volatile substance release during the thermal decomposition of coal without air. For coal with an output of volatile substances up to 30%, a strict pattern between the content of methane in pyrolysis products and the degree of dust explosion used for the classification of coal seams is traceable.The concept of the release of volatile substances is considered. The method of determining the yield of volatile substances, the essence of which is to calibrate the analytical (air-dry) fuel sample in a muffle furnace without access to air at a temperature (900 ± 5) ºС for 7 minutes. When heating solid fuels is decomposition of thermally unstable molecules of organic substances of combustible mass and carbohydrate compounds. At the same time, combustion gases (СH4, СО, H2) and incombustible (СО2, O2, N2, etc.) are emitted. Main components of volatile substance composition that determine explosiveness of dust are resinous compounds and heavy hydrocarbons. Basic combustion agents of volatile substances are methane, hydrogen, carbon oxide, carbonate gas, ethane, heavy hydrocarbon, etc.Concept of volatile substance release and method for determining this parameter are presented in the article. It is argued that the main component of gaseous products of thermal influence, which determines the explosion of coal dust - methane. An analytical dependence between lower limit of coal dust explosiveness and volatile substance releaseisproposed.
Keywords:
release of volatile substances, test, coal dust, explosiveness.
References:
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About the authors:
Mineev Sergei Pavlovich, Doctor of Technical Science (D. Sh), Professor, Head of Department of Pressure Dynamics Control in Rock, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Dyakun Inna Leonidivna, Candidate of Technical Science (Ph. D), Senior Researcher of Department of Mine Energy Complexes, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Yaschenko Igor OleksIyovich, Candidate of Technical Science (Ph. D), Deputy Head of Department of Labor Protection of the Ministry of Energy and Coal Industry of Ukraine, Kyiv, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
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