Comprehensive Benefit Evaluation Of Coal Mining Areas’Land Reclamation Base On GIS Technology And AHP Method

China is the largest coal producer and consumer country in the world.For a long time, the development and utilization of coal resources has become one of the pillar industries in china. But at the same time,the exploitation of resources has led to land subsidence, air pollution, damage to the natural landscape, a serious threat to people’s life and property safety. With the development of city modernization and industrialization, the demand for land resources is becoming bigger, the contradiction between people and land become more prominent, people begin to pay attention to how to achieve the maximum economic benefits of land reclamation, ecological benefit, social benefit comprehensive benefit and maintain the sustainable use of land resources.In this paper, taken Shanxi Xingyu coal mine land reclamation comprehensive benefit evaluation for the study, in different types of land reclamation engineering design for different basis, run Space model in the ArcGIS platform to calculate land reclamation costs, used a static investment yield、dynamic investment recovery period、land reclamation rate thirteen indicators AHP evaluation Land Reclamation comprehensive benefits, in order to achieve improved land productivity, maximize the use of arable land, improve mining economic benefits and improve the quality of mine ecological environment and social environmental quality objectives,and got the mainly conclusion.Firstly, land reclamation fee calculation space model can automatically fast and accurate statistics of damaged land reclamation mining engineering, reclamation costs. Used the computational speed model is higher than previous Excel form, budget software operation, and can be intuitive query "damaged plots Calculator-reclamation engineering quantity and cost" using field, specific to each damaged plots.Secondly, studied preliminary on the relationship between land reclamation engineering construction costs and land reclamation of static investment, the dynamic investment. Analysis reclamation project construction costs can not be obtained as a measure of the size of the standard static and dynamic investment, land reclamation static and dynamic investment can not be judged based on the merits of land reclamation schemes, need to consider various factors.Also found that the small-scale land conservation engineering design can play a reduced role in land reclamation construction costs. Thirdly, applied AHP in Xing Yu mine land reclamation for comprehensive benefit evaluation, initially identified dynamic investment recovery period, static investment yield rate of new cultivated land, land reclamation rate, residents support rate, six indicators of biodiversity status of land reclamation comprehensive Benefit Assessment project score a decisive role.Finally, lacked of suitability evaluation for land reclamation comprehensive benefits affect the accuracy of the evaluation results,and AHP affected the objectivity of project evaluation to a certain extent,...