Study On Eco-environmental Cumulative Effects In Coal Mining Area

Coordinated development between coal resource exploitation and eco-environment is one of the important propositions of national economic and social development planning. Due to the obvious characteristics of cumulative effects impacts on the eco-environment caused by coal resource exploitation activities, studies on theories, applications and adaptive management of ecological cumulative effects in coal mining area will become the key issues in the mining area sustainable development.In this dissertation, Lu an coal mining area is chosen as a typical study area, analysis and assessment method system of eco-environment cumulative effects was investigated and built by taking mining area ecological cumulative effects analysis and assessment as the outline, applying multi-disciplinary theories and research methods, adopting the system integration method combining qualitative and quantitative analysis organically, and integrating theory and practice. Based on summarizing concepts of mining area, cumulative effects and eco-environment, etc., and analyzing eco-environment cumulative effects mechanism and the interaction relationships between mining area development and eco-environment system in the coal mining area, cumulative effects models of the main ecology effects were built by selecting water and soil elements as the main research objects. On the basis of summarizing the spatio-temporal characteristics of landscape evolution cumulative effects in coal mining area, establishing the spatial cumulative burden model composed of landscape type structure deviation, landscape pattern disturbance and ecology sensitivity degradation cumulative degree indices in coal mining area. After generalizing, analyzing and summarizing the traditional environment analysis methods, a GIS-based SD-ANNCA-GIS model integrating advantages of System Dynamics and Neural Network Cellular Automata, which can analyze the spatio-temporal cumulative effects, was established. In view of mining area eco-environment adaptive management, the relationships between mining area eco-environment carrying capacity and cumulative effects were analyzed, the evolution status and development trend of compound ecosystem in coal mining area were characterized by ecological carrying, impact disturbance and feedback corresponding variables. Referencing the DPSIR model, establish the conceptual framework of mining area eco-environment cumulative effects assessment, and double ring indices system framework model was proposed for eco-environment cumulative effects analysis and eco-environment quality synthetic assessment in mining area. Considering response characteristics of eco-environment factors from the coal resources exploitation, assessment indices dynamic variable weight quantization method, which bases on cumulative information, was presented in view of cumulative variable weight, and a spatio-temporal integration, dynamic analysis and assessment model was constructed for the mining area eco-environment cumulative effects, namely genetic projection pursuit-cumulative effects variable weight-synthetic assessment.The study reveals eco-environment cumulative effects styles, paths and characteristics on the whole, the interaction relationships between coal resources exploitation, eco-environment and eco-environment cumulative effects mechanism in coal mining area. The cumulative approaches of main ecology factors ecological effects were analyzed and the cumulative effects assessment method was presented using GIS and RS. The eco-environmental cumulative effects analysis and assessment methods model was built preliminarily in coal mining area. The relative index of eco-environment cumulative effects was calculated by designing different scenarios in the study area between 2010 and 2030.It is proved that research conclusions have some theoretical and practical significance in enriching and improving the eco-environment assessment theory, promoting the coordinated development between the coal resources exploitation and eco-environment and advocating healthy and ecological mining area, etc.