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THE NATURE OF THE CHANGE IN TECHNOGENIC CONTAMINATION OF THE UNDERGROUND WATER OF THE EASTERN DONBASS (RUSSIA)*
Abstract
For a long time, coal mining in the Eastern Donbass was the most powerful factor affecting the natural environment. The most significant were the natural underground and surface waters. Their pollution was due to mixing with highly mineralized man-made mine waters, which seeped through the rock mass, polluting the underground hydrosphere, and at the same time, as a result of pumping out of mines, fell into rivers. As a result of the closure of most coal mines in the region in the 1990s, the processes of hydrosphere pollution even worsened. The termination of the pumping of mine waters led to the flooding of the underground space and the intensification of chemical leaching of rocks [1]. The processes of closing the worked-out underground space under the pressure of the mass of overlying rocks led to a sharp increase in the fracturing of the massif, and, consequently, its permeability. The polluting role of mine waters has intensified. Long-term monitoring of groundwater in the Eastern Donbass showed significant changes in the degree of pollution in time. They are mainly associated with spasmodic fluctuations in the content of trace elements - toxic heavy metals.
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References8
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