CALCULATION OF PARAMETERS FOR COUPLED PROCESSES OF THE ROCK STRESSED STATE CHANGING AND TWO-PHASE FLUID AND GAS FILTRATION AT WATER INFUSION INTO THE COAL SEAM

Details

Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 123

UDC622.831.322: 532.528

Authors:

Krukovskaya V.V. D.Sc. (Tech.), Senior Researcher (IGTM NAS of Ukraine)

Zberovskiy V.V. Ph.D. (Tech.), Senior Researcher (IGTM NAS of Ukraine)

Abstract.

Amethod for simulating processes occurred in the mine workings at water infusion into the coal seam is proposed. This method takes into account not only the change of the coal-and-rock massif stress state, resulting in pressure relief during the roadway driving and fluid injection but also liquid and gas participation in formation of an unloaded zone with intensive fracturing. Dependence of the absolute filtration permeability on a ratio of principal stress tensor components is taken into account at each point in the study area.

Results of the numerical simulation and distributions of geomechanical and filtration parameters at different time points of the hydrodynamic influence on the coal seam in the working face are shown.

The research will allow improving selection of technological parameters of high-pressure fluid injection, and increasing safety of the mining operations.

Keywords:

static and pulsed modes of water infusion into the coal seam, coupled processes, numerical simulation.

References:

1. Ukraine Ministry of Coal Industry (2005), 10.1.001740088-2005. Pravilavedeniyagornykhrabotnaplastakh, sklonnykh k gazodinamicheskim yavleniyam: Normativnyu document Minugleproma Ukrainy. Standart  [10.1.001740088-2005 Mining rule in seams prone to gas-dynamic phenomena: Regulatory Document Coal Industry of Ukraine. Standard], Ukraine Ministry of Coal Industry, Kiev, Ukraine.

2. Nasedkina, A.A., Nasedkin, A.V. and Iovane, G.A. (2008),  “A model for hydrodynamic influence on a multi-layer deformable coal seam”, Computational Mechanics, vol. 24, no. 3, pp. 379-389.

3. Bulat, A.F., Krukovskaya, V.V., Krukovskyy, А.P. and Zberovskiy, V.V. (2012), “Numerical Simulation of Hydroimpulsive Impact on Outburst Coal Seam”, Geotekhnicheskaya Mekhanika [Geo-Technical Mechanics], no. 105, pp. 14-25.

4. Bulat, A.F., Krukovskaya, V.V. and Zberovskiy, V.V. (2013), “Comparison of Parameters of Coupled Processes Mode of Massif Deformation Change and Fluid Filtration in Different Modes of Water Infusion in Coal Seams”, Geotekhnicheskaya Mekhanika [Geo-Technical Mechanics], no. 108, pp.197-205.

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6. Masket, M. (2003), Fizicheskie osnovy tekhnologii dobychi nefti [Physical principles of oil production], NITS «Regularnay i chaoticheskaya dynamika», Moscow-Izhevsk, Russia.

About the authors:

Krukovskaya Victoriya Victorovna, Doctor of Technical Sciences (D.Sc.), Senior Researcher, Senior Researcher in Department of Pressure Dynamics Control in Rocks, 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. .

Zberovskiy Vasily Vladislavovich,Candidate of Technical Sciences (Ph.D.), Senior Researcher, Senior Researcher in Department of Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine.

 

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