SIMULATION OF COUPLED PROCESSES THAT OCCUR IN COAL ROCK MASSIF DURING MINING OPERATIONS

Details

Parent Category: Geo-Technical Mechanics, 2015

Category: Geo-Technical Mechanics, 2015, Issue 121

UDC 691.32:620.193.4:539.219.3

Author:

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

Abstract.

Interrelation of deformation, diffusion-filtration, and other physical processes in the coal-rock massif under various technological influences is analyzed in this paper.

A set of mathematical models and computational methods were proposed. It permits to combine into a coupled system of multiple physical processes occurring in the rock mass under various technological impacts, and to simulate the complex processes of geomechanics. A criterion for the evaluation of the degree of influence of each of the coupled processes to changes in the common parameters array was proposed to determine whether to take them into account in an corresponding mathematical models. It is shown that the neglect of some of the processes in the mathematical modeling of complex physical processes leads to error, reaching 250 %.

The mathematical models and methods of calculation of coupled processes parameters «deformation of the rock massif with roof bolting – methane filtration», «deformation of the rock massif with roof bolting – methane filtration – the action of an explosion», «change in the stressed state of the working face – methane filtration – methane desorption» during the gas-dynamic processes, «change in the stressed state of the working face – the two-phase fluid and gas filtration» during fluid injection into the coal seam. The spatio-temporal patterns of the change of coupled processes parameters established at the base of this models.

Keywords:

coupled processes, stress-deformed state of the coal-rock massif, fluids filtration, gas-dynamic phenomena, anchoring, the action of the explosion.

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About the author:

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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