Мineev S.P., Sapegin V.N., Golovko Yu.I., Yanzhula A.S. ESTIMATION OF PARTICULAR FREE-METHANE FILTRATION IN STRUCTURALLY HETEROGENEOUS COAL SEAMS

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Parent Category: Geo-Technical Mechanics, 2016
Category: Geo-Technical Mechanics, 2016, Issue 128

ESTIMATION OF PARTICULAR FREE-METHANE FILTRATION IN STRUCTURALLY HETEROGENEOUS COAL SEAMS

Мineev S.P.,  Sapegin V.N., Golovko Yu.I., Yanzhula A.S.

Мineev S.P., D.Sc.(Tech),Professor,

Sapegin V.N., Ph.D (Tech)

(ИГТМ НАН Украины)

Golovko Yu.I., M.S (Tech),

Yanzhula A.S., M.S (Tech)

(PJSC «MM «Pokrovskoye»)

 

 Abstract. Distribution of free-gas pressure in structurally inhomogeneous coal seam in zone with bearing pressure was analyzed at unsteady isothermal process. The well-known Yu.P.Zheltov’s model of unsteady isothermal filtration was used, which was created by the G.I. Barenblatt’s method of integral relations for uniform coal seam in a uniform stress field with constant gas pressure in the bottom-hole and seam and constant porosity of and constant gas permeability in the coal seam. In this study, gas permeability in a zonally inhomogeneous medium was calculated by the K.S. Basniev’s method, and with the help of this method, it is possible to determine average characteristics of the coal-layer structural heterogeneity, namely, gas permeability of the medium, and to apply the well-known Yu.P. Zheltov’s model in order to calculate the pressure distribution. In this article, an algorithm is proposed for calculating structural inhomogeneous medium, including geologically disturbed medium, which allows determining distribution of gas pressure depending on distance from the face of the tunnel, filtration time and speed of gas filtration in zone with bearing pressure

Keywords: filtration, geological dislocation, gas permeability, structurally heterogeneous seam, gas pressure, zone with bearing pressure

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REFERENCES

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About the authors

Mineev Sergey Pavlovich, Doctor of Technical Sciences (D.Sc.), Professor, Head of Department of Pressure Dynamics Control in Rocks, N.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, sergmineev @ gmail.com

Sapegin Vladimir Nikolayevich, Candidate of Technical Sciences, Researcher of Department of Mineral Mining at Great Depths, N.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Golovko Yuri Ivanovich, Master of Science, Director of the Mine Management "Pokrovskoye", Pokrovsk, Ukraine

Yanzhula Aleksey Sergeyevich, Master of Science, Chief Engineer of the Mine Management "Pokrovskoe", Pokrovsk, Ukraine