Prediction of Ground Surface Displacements from Studies of Deformation Properties of Moist Rocks
E. V. Borisenko1, F. M. Golubev2, S. A. Popovich1
1Institute of Physics of Mining Processes, Donetsk, Russia
2Republican Academic R&D Institute of Mining Geology, Geomechanics, Geophysics and Mine Surveying, Donetsk, Russia
Keywords: Water saturation, rock, stress, deformation properties, closure, finite-element model, zone of water-conducting cracks, displacement activation, mine roadway flooding
Abstract
The article describes experimental studies on water saturation of samples of major rock types typical of Donbass. The alterations of deformation properties of moist rocks are generalized. The procedure of modeling with regard to the effect of flooding on displacement parameters in different rocks is presented. Using laboratory data, a finite-element model of activation of geomechanical processes initiated by rock mass undermining and flooding is constructed. It is found how rock mass lithology influences displacement parameters in flooding of underground roadways in coal mines being closed. The research results can help improve effective regulatory documents on ground surface displacement prediction in coal mining and mine closure through lithological analysis of coal-rock mass.
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