Krukovskaya V.V., Molchanov A.N., Kalugina N.A. Aspects of mathematical simulation of methane filtration near the tectonic dislocations

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Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 124

 

Geoteh. meh. 2015, 124, 115-127

ASPECTS OF MATHEMATICAL SIMULATION OF METHANE FILTRATION NEAR THE TECTONIC DISLOCATIONS

¹Krukovskaya V.V.

¹IGTM of the NAS of Ukraine

¹Molchanov A.N., ¹Kalugina N.A.

¹IPMP of the NAS of Ukraine

UDC 622.831.332:551.24

Abstract. Issues of methane filtration parameters changing near the tectonic disturbances are considered in the article. A mathematical model was designed for simulating joint behaviour of the non-stationary coupled processes of elastoplastic stress-strain state changing in the fractured-porous medium and methane filtration around a single roadway in the tectonic disturbance zone. Effect of a ratio between the principal stress tensor components on rock permeability changing was taken into account.

Distributions of values of methane pressure around the roadway and graphs of the coal seam permeability are shown in different time points near tectonic dislocation and non-disturbed zone in the coal seam. It is stated that methane filtration occurs in a quasi-stationary mode outside the bro-ken area, and dynamic process are not further developed. In a disturbed zone of the coal seam, gas emission into the roadway increases by 1,5-6,7 times if compare with the gas emission outside the disturbed zone. Depth of methane filtration area increases with time when the roadway is advanced through the undisturbed coal seam; when geomechanical and filtration processes are developed dy-namically near the tectonic dislocations depth of filtration area at the front of destruction signifi-cantly reduces; the depth continues to grow only after returning back from dynamic mode to the quasi-stationary mode of filtration.

Keywords: methane filtration, tectonic dislocations, gas-dynamic processes.

 

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About the authors

Krukovskaya Victoriya Victorovna, Doctor of Technical Sciences (D. Sc.), Senior Researcher, Senior Researcher in Department of Control of Dynamic Demonstrations of Rock Pressure, M.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. .

Molchanov Aleksandr Nikolaevich, Doctor of Technical Sciences (D. Sc.), Deputy Director of the institute, Institute of Physics of mining processes (IPMP NAS of Ukraine), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Kalugina Nadezhda Aleksandrovna, Candidate of Technical Sciences (Ph. D.), Senior Researcher, Scientific Secretary of the institute, Institute of Physics of mining processes (IPMP NAS of Ukraine), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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