Method of calculation parameters of coupled processes of coal-rock massif deformation and methane filtration

Krukovskaya V.V., Krukovskiy D.A.

Authors:

Krukovskaya V.V., D.Sc. (Tech.), Senior Researcher (IGTM of the NAS of Ukraine),
Krukovskiy D.A., student (O. Honchar DNU)

UDC 622.267.5

Language: Russian

Abstract.

Method for calcualting parameters for the coupled processes of the coal-rock mass deformation and methane filtration was developed with taking into account process of mutual influence and in-time changes. The condition of interaction between the geomechanical and filtration processes is dependence between permeability coefficients and stress tensor components. Feedback is realized through the forces, which are caused by the gas pressure, and which are taken into ccount in the calculation of the total force acting in each point of the solid body. A block diagram of the calculation algorithm is shown. Displacement and stress fields, permeability coefficients, methane filtration parameters are calculated for each time iteration.

With the help of the method, it possible: to study methane emission into the roadways and efficiency of degassing boreholes in different mining, geological and technological conditions; to calculate geomechanical and filtration parameters for the coal-rock mass in tectonicaly disturbed zone of the coal seam and at gas-dynamic phenomena. As an example, methane filtration into the roadway is considered. The calculated geomechanical parameters, zones of inelastic deformations, coefficients of permeability and methane pressure in filtration area are shown.

Keywords:

coupled processes, deformation of coal-rosk mass, methane filtration, calculation algorithm

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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), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Krukovskiy Dmitriy Aleksandrovich, student of Oles Honchar Dnipropetrovsk National University (O. Honchar DNU), Dnipro, Ukraine