Specific features of present-day chemical composition of ground-water in coal-bearing districts of Sakhalin Island
The paper discusses the specific features of the present-day chemical composition of underground waters in coal-bearing districts of Sakhalin Island. It was established that the processes, occurring in the underground hydrosphere in response to flooding of the coal mines, are accompanied by an increase in the dissolved matter concentrations and change of the underground water composition. A strictly specified complex of the secondary solid and liquid formations is produced. Temporal fluctuations of the underground water compositions of the anthropogenic horizons dont cause the principal change of the geochemical water type. The mine water composition doesnt depend on the type of hydrogeological structures and coal metamorphism, but is governed by hydrogeological parameters and primarily by the time of water-rock interaction.