Boiko K. Features of groundwater dynamics establishment during mines flooding within Toretsk-Enakieve mining and industrial agglomeration

The thesis covered issues of groundwater dynamics establishment features research during the mines flooding within Toretsk-Enakieve mining and industrial agglomeration. The relevance of the study stems from the fact, that mass mines liquidation in this region, because of low level of funding of coal restricting sector, occurs rudderless, when it comes to hydrodynamic regime management around the mine fields. Taking into account the lack of proven methodological solutions and engineering measures, this could eventually lead to negative consequences – such as surface waterlogging, groundwater and surface water quality deterioration, the decline in the engineering and technical state of constructions foundations. Under the research a set of methods was applied. It includes geofiltration mathematical modeling method, geoinformational method and methods of satellite images interpretation and processing. It has been found that the flooding level rising is particularly defined by the permeable properties of the rock mass, which was significantly disrupted due to long-term mining. Geofiltration modelling and proper model calibration, based on water budget components convergence, have resulted in filtration parameters, that characterize technologically disturbed waterbearing complex, being obtained. Modeled hydraulic conductivity values at different depth intervals are greater than values set for sampled area after the previous hydrogeological investigations. The principles of environmental engineering projects elaboration and development were proposed in order to avoid the waterlogging process. It provides for the critical flooding level maintaining at absolute marks +40-+50 m through the establishment of groundwater level depletion zones around the buffer mines, equipped with submersible pumps, and also through the hydrogeological monitoring wells network development to observe groundwater table levels.