Resources Metabolism Of The Integrated Ecosystem In Coal Mining Area Based On Material And Energy Flow Analysis

Coal,as an important energy source in China,is very important for economic development.How to rationally exploit and utilize and maximize economic and social benefits is a common concern of governments,experts and scholars and relevant enterprises.At the same time,a series of processes such as coal mining,washing and utilization are accompanied by environmental pollution and resource waste.How to coordinate the sustainable development of resources,environment and economy is the key to realize sustainable development of coal mining areas.Based on the theory of ecosystem metabolism,this paper studies the resource metabolic efficiency of composite ecosystem in coal mining area by means of material flow and energy analysis method,and makes a comprehensive fuzzy evaluation to analyze the resource metabolic level of composite ecosystem in coal mining area,which provides new ideas and methods for the study of composite ecosystem in coal mining area.It has theoretical and practical significance.Firstly,the theory of ecosystem metabolism is discussed.Secondly,according to the process of ecosystem metabolism and the particularity of complex ecosystem in coal mining area,the producers,consumers and decomposers of complex ecosystem in coal mining area are defined,and the resource metabolism analysis framework of complex ecosystem in coal mining area is constructed.Based on the analysis of material flow and energy flow,the resource metabolism material flow model and energy flow model of complex ecosystem in coal mining area are constructed.By comparing the metabolic process of coal resources with that of traditional coal resources,the framework of sustainable development of coal resources is put forward,and the material reduction effect analysis model of composite ecosystem in coal mining area is established from the perspectives of material input and waste discharge.Finally,according to the theory of material flow,the evaluation index system of resource metabolism level of coal mining area composite ecosystem is constructed,and the fuzzy comprehensive evaluation model and index system weight model of resource metabolism level of coal mining area composite ecosystem are established.The weight of evaluation index is determined by improved analytic hierarchy process,and the fuzzy membership function is used to determine the fuzzy membership degree of evaluation index.Taking Dalong Coal Mine of Tiefa Coal Industry Co.,Ltd.as an example,this paper conducts an application research,analyses the metabolic process of coal resources inDalong Coal Mine,and evaluates the metabolic level of composite ecosystem resources in Dalong Coal Mine.The results show that the following ecological and environmental problems exist in the mining of coal resources in Dalong Coal Mine:(1)in the process of mining coal in Dalong Coal Mine,the amount of waste discharged is large and the environment of polluted land is serious;(2)the unreasonable utilization of coal gangue,mine water and associated minerals results in serious waste of resources;(3)the mining subsidence area in Dalong Coal Mine is not treated in time,and the input of environmental protection is low,resulting in water pollution.Soil erosion and environmental pollution;(4)less investment in fixed assets,the existing technology and equipment can not achieve the effective use of resources.Based on the analysis results,the management suggestions of the composite ecosystem in Dalong Mine are put forward:(1)optimizing the existing resource metabolic process in Dalong Mine to improve the utilization rate of coal gangue,associated minerals and mine water;(2)strengthening the restoration and treatment of land subsidence areas to realize land reuse;(3)increasing investment in fixed assets,introducing advanced technology and equipment,and increasing coal mining.The utilization efficiency of each link of resources;(4)Extending the ecological industrial chain of coal resources mining.