| Huainan is a coal-mining city and an important energy base in China. The coal-exploitation industry has offered enormous energy to support economic construction of the East China for many decades and the city has pushed forward economic development and society advance to a certain extent. By contraries, a series of environmental ecologic problems has been presented: the generation and accumulation of a large amount of solid wastes (especially Coal-mining Spoils and Coal-combustion By-Products) and the formation of a large scale coal-mining subsidence, which not only concern the huge loss of land resources and the destroy of the ecological landscapes as well as the pollution of the ecological environment in the coal-mining areas, but also impact seriously the economic development and limit normal living of local people in the energy city.The ecological restoration of the coal-mining subsidence is the primary engineering in the construction of "ecological coalmine area" in "ecological Huainan" programme. Accodingly, landfill of the subsidence in Huainan is an important approach of disposing the Coal-mining Spoils and Coal-combustion By-Products that are used to fill in due to scarcity of land resources and 3R-disposal ( i.e resource,reduce,recycle ) of industrial solid waste. Consequently, it is foundation to conduct the ecological environmental impact of Coal-combustion By-Products and Coal-mining Spoils which was else done for an efficient implementation of ecological restoration engineering of coal-mining subsidences .Based on the current findings of domestic and international research in the concern field, this dissertation investigated systematically the characteristic of the coal-mining subsidence of Huainan and focused on the studies of the mobility and environmental impact of hazardous elements in Coal-combustion By-Products. Moreover, the ecological restoration mode of coal-mining subsidence in Huainan was discussed and demonstrated according to the "Concept Plan of Eco-City Construction of Huainan (2003-2020)". Here it accentuates the aim of the sustainable development mode, with the systemic engineering implements of the integrated treatment of geologic environment, coal-mining subsidence reclamation with landfilling of the energy industrial solid wastes, resource utilization of the subsidence water areas and reconstruction of ecological systems in the subsidence regions, to promote successively construction of the huge ecological mine area in estern China with an integrated and harmonious "society-economy-nature*"ecosystem in mining area and to carry out the construction object of "ecological Huainan" with the recycle—economy concept. |
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