Reclamation direction delimitation and planning division of coal mining subsidence areas with high water level plain mining area

The mining subsidence land in the high water level plain mining area has the characteristics of wide range， large depth， serious water accumulation， and relatively complicated land use conditions.In order to scientifically guide the design and construction of comprehensive management of coal mining subsidence in this area， taking Jining City as an example in this study，the geological and mining data，existing observations and land use status data of various mines in Jining City district were collected.On the basis of fully grasping the current status of coal mining subsidence land，the probability prediction software was used to predict the coal mining subsidence of Jining City by 2020， and the extent of land damage and the delimitation criteria of management boundary were determined.According to the damage characteristics of coal mining subsidence land in Jining City， based on the land unit utilization direction， a comprehensive treatment model suitable for coal mining subsidence land in Jining City was proposed.The result show that the surface subsidence depth and subsidence range have gradually expanded，and the characteristics of land damage in different regions are significantly different with the exploitation of coal resources.The main influencing factors that determining the coal mining subsidence land use in Jining City include five natural factor indexes of ground slope， subsidence type， groundwater depth， degree of reclamation difficulty， subsidence stability， and five social and e-conomic factor indexes of urban location， traffic conditions， water source conditions， policy guidance and the current situation of the treated area.The land application results were obtained from three perspectives：comprehensive agricultural management，comprehensive ecological management， and urban function construction.The mining subsidence land in Jining City is divided into four management areas， i.e.ecological landscape management area in the eastern mining area， urban functional development and management area in the central mining area， agricultural comprehensive management area in the northwest mining area， and characteristic industrial management area around the lake in the southern mining area.At the same time， the management and utilization direction and regional land use structure of the governance area are optimized to achieve the purpose of saving intensive land and promoting regional sustainable development.