Abstract
Experimental modelling methods are used for prediction of deformation and groundwater outflows at the bottom of an open-pit mine during the excavation of brown coal. Thermal gas-bearing artesian water exerts an uplift pressure on the impervious subsoil of the coal seam and threatens the stability of the mine bottom. The breakthrough of the mine bottom would seriously affect the groundwater regime and may endanger mining activities. The mining is carried out within the protection zones of the Carlsbad spa springs. Results of model studies are used to determine protective hydrogeological and mining measures for providing the maximum protection for the open-pit mine and the spa springs.
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