Landscape Ecological Evaluation And Planning Strategy In Coal Mining Collapse Area: A Case Study In Sima Mine

Coal has an irreplaceable position in the development of human society,and even in today's social and scientific and technological development,coal is still one of the most important sources of energy that mankind has ever used.In China,mining cities,as the backbone of raw materials and energy industry,have played an extremely important role in the realization of industrialization and modernization of our country.Now,due to the large number of coal mining,many mining cities have been faced with problems such as ecological destruction and environmental pollution.In these problems,the environmental impact caused by coal mining subsidence area has become the most serious environmental problem in mining cities,which not only hinders the sustainable development of the region,but also seriously affects the quality of residents' living environment.Sima Mine is located in Changzhi county,Changzhi city,Shanxi Province.It belongs to the eastern edge of qinshui coalfield Changzhi exploration area.Years of mining have resulted in large area of coal mining in the mine area,which has caused adverse effects on the economic development,ecological environment and visual landscape effect of surrounding cities and towns.Based on the collection and analysis of on-site investigation,expert consultation,historical data and literature,this paper carried out a comprehensive evaluation of landscape ecology in the coal mining subsidence area of Sima Mine mining area.According to the characteristics of coal mine mining subsidence area,three projects of ecological environment,diversity and landscape quality were selected for evaluation indicators,and 10 concrete evaluation indexes were selected,including vegetation coverage,land productivity,soil erosion,water quality,surface stability,biological diversity,landscape diversity,aesthetic value,appropriate human nature and landscape fragmentation.The weight of each index was established by using analytic hierarchy process,and the evaluation index of three subsidence areas in Sima Mine mining area was evaluated.Based on the landscape ecological evaluation of three coal mining areas in Sima Mine,the comprehensive evaluation index CEI of Ruyi lake(no.1 subsidence area),no.2subsidence area and no.3 subsidence area of sima mine was found to be 0.904,0.484 and0.412 respectively.The comprehensive evaluation results of Ruyi lake and the other two subsidence areas were significantly different,and it could be seen that the landscape ecological planning and ecological restoration of Ruyi lake had been improved after a period of time.In combination with the successful cases of landscape ecological planning and design of coal mining subsidence area at home and abroad,the paper made the three subsidence areas of Sima Mine as the research objects,and investigated the current situation of each region.Later,the evaluation results were analyzed and located,and the appropriate landscape ecological planning strategy was provided.