Molchanov А.N., Vengerov I.R., Diedich I.A., Pichka T.V., Troitskiy G.A., Кamchatniy А.А. Determination of methane filtration parameters in coal seams

Details

Parent Category: Geo-Technical Mechanics, 2019

Category: Geo-Technical Mechanics, 2019, Issue 149

Geoteh. meh., 2019, 149, 38-47

https://doi.org/10.15407/geotm2019.149.038

 

DETERMINATION OF METHANE FILTRATION PARAMETERS IN  COAL SEAMS

¹Molchanov А.N., ¹Vengerov I.R., ² Diedich I.A., ¹Pichka T.V., ¹Troitskiy G.A., ¹Кamchatniy А.А.

¹Institute  for  Physics  of  Miming  Processes  NAS  of  Ukraine,  ²Private  Joint-Stock  Company  «Donetsksteel» - Iron  and  Steel  Works»

UDC 536-12:517.956.4:622

Language: Russian

Annotation.

The problem of the preliminary determination of methane emission parameters to the mine workking on the basis of mine-geological information of coal seam, for which planning of conducting of mine works is executed , is explored in the article, In particular, the parameters of ventilation of the mine workings are determined. For determination of parameters of methane emission to the mine working it is suggested to use the methods of mathematical design of mass transfer of methane in heterogeneous coal seams. Applicability of offered by authors before the model of methane filtration in a heterogeneous coal layer for implementation of practical calculations of methane efficiency of seam (I.e. output of methane in wall face through the surface of face) is examined. The conditions of applicability of isotherms of sorption of Henry and Lengmyur for scientific and engineering calculations are analysed. The ranges change of parameters of isotherms change are found for the real conditions (temperature, depth of bedding of coal seam, output of coal volatile) and estimations of their applicability are conducted.

Coming present in a presence mine information characterizing a coal seam, authors conduct the calculation of methane capacity and barocapacity of coal. The analysis of parameters of the offered mathematical model for the real conditions of seam  block 10 MM «Pokrovskoe» is conducted for this purpose, using information for two wall faces, for which the calculations of filtration parameters necessary for determination of seam methane efficiency layer are executed. Comparison of the got results with the real mine information is conducted.

Research results show that the use in the scientific and engineering calculations of methane sorbtion isotherms of Henry is possible only for situations (enough rare), when the parameters of methane pressure  in different points of coal seam do not exceed 4,53 atm. In most real situations it is necessary to use the Lengmyur isotherm. Empiric formulas for the calculation of coal methane capacity is good concerted between itself and is allowed to get results satisfactorily concordant with experimental information. The model of methane filtration in a heterogeneous coal layer offered by authors before is adequate, as in its scopes it is succeeded to define (with bringing of empiric correlations) filtration parameters and find specific seam methane efficiency, which on a size are near to certain on the basis of the practical mine measurings. Efficiency of systems approach to the mathematical design of processes of transfer in the geo-technogen systems is confirmed.

Keywords: filtration, mass transfer, coal seam, mathematical design.

References

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About the authors

Molchanov Aleksander Nikolaevich, Doctor of Technical Sciences (D. Sc), Senior Researcher, Director, Institute for Physics of Mining Processes of the National Academy of Sciences of Ukraine (IPMP of the NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Vengerov Igor Ruvimovich, Doctor of Technical Sciences (D. Sc), Senior Researcher, Senior Researcher in Department of Physics of Sorption Processes, Institute for Physics of Mining Processes of the National Academy of Sciences of Ukraine (IPMP of the NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Diedich Ivan Aleksandrovich, Candidate of Technical Sciences (Ph.D), Leading Specialist of the Directorate for Labor Protection, Industrial Safety and Ecology, Private Joint-Stock Company «Donetsksteel» - Iron and Steel Works» (PJSC «Donetsksteel» - Iron and Steel Works»), Pokrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Pichka Tatiana Vladymirovna,Candidate of Technical Sciences (Ph.D), Senior Researcher in Department of Physics of Sorption Processes, Institute for Physics of Mining Processes of the National Academy of Sciences of Ukraine (IPMP of the NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Troitskiy Grygory Aronovvich, Candidate of Physics and Mathematics (Ph. D), Senior Researcher, Senior Researcher in Department of Physics of Sorption Processes, Institute for Physics of Mining Processes of the National Academy of Sciences of Ukraine (IPMP of the NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Kamchatniy Aleksey Anatolievich., Master of Science, Junior Researcher in Department of Physics of Sorption Processes, Institute for Physics of Mining Processes of the National Academy of Sciences of Ukraine (IPMP of the NAS of Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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