INFLUENCE OF PENETRATION DEPTH IN OUTBURST DANGER ZONE ON THE GAS-DYNAMIC PROCESSES NEAR TECTONIC DISPLACEMENT

Details

Parent Category: Geo-Technical Mechanics, 2014

Category: Geo-Technical Mechanics, 2014, Issue 119

UDC 622.831.322:551.243:533.15

Authors:

Krukovskaya V.V., D.Sc. (Tech.), Senior Researcher

 (IGTM NAS of Ukraine)

Abstract. Analysis of geological conditions for the occurrence of sudden coal and gas outbursts in the central and other parts of Donbass shows that the majority of outbursts occurred in tectonically disturbed areas where the outburst is initiated by the penetration of a potential outburst danger zone. In order to determine the influence of the depth of penetration in the area of outburst on the development process of coal and methane outburst, a set of numerical experiments was executed. We used a mathematical model of coupled non-stationary processes of stress field change, filtering and methane desorption. It is shown that the geomechanical and filtration processes are moving from a quasi-stationary in a dynamic regime just inside the outburst danger zone. The coal permeability and methane filtration rate is sharply increasing, pressure of methane gradients take very high values. The curves of change of filtration parameters for different values of the penetration depth in outburst area at different times is demonstrated. It is shown that the wave of destruction advanced of a wave of pressure by 0.09 m to accept the simulation.

Keywords:

 coal and gas outburst, numerical simulation, tectonic displacement.

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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.

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