Scientific and methodological foundations to develop numerical hydrodynamical models of mine fields in Donbas

The paper considers specific character of hydrogeological
problems arising during the whole cycle of a mining enterprise operation;
the most reliable their solutions are implemented in the context of
numerical hydrodynamical models of mine fields. Basic approaches to
schematize laminated carbonic formation through simplification of natural
rock mass permeability have been substantiated; prediction algorithm of its
changes during temporal transformation has been developed. Numerous
identification problems solving in the process of modeling mine fields has
helped understand that water inflow amount cannot be correlated with the
extension of mining area. Within the areas with roof caving, permeability
of carbonic formation is a time variable which value increases 10 – 15
times in the context of rock displacement, halves after 5 – 10 years and
nears natural values after 15 – 20 years. In the context of Western Donbas,
the modularized schemes have been tested while solving problems
concerning filtration control within mine fields and their surface influence
areas with high confidence of hydrogeological forecasts.