| Xinwen Mining Group, the large -sized national corporation which produce raw coal over ten hundred million tons every year, lies in the city of Xintai. A series of ecological and environmental questions caused by the coal mining underground have seriously affected the sustainable development of regional society and economy, especially deeply influenced the production of agriculture and industry. From the point of Restoration Ecology and land Rehabilitation, the characteristics of subsidence lands of coal extraction in Zhaizhen Town which differed from the typical phreatic high lever plain mining areas in Lianghuai are analyzed. Supported by Geographic Information System (GIS) and based on the nature geographic and society economic conditions in Zhaizhen Town, the evaluation system to the potentiality of subsidence lands of coal extraction rehibilitation are established,and divided them into three grades. Question of land utilization structure optimization of subsidence areas of coal extraction have tentatively discussed from the feasibility of theory and practice. The major contents are as follows: 1.synthetic narration(1) The origin of subsidence lands of coal extraction has analyzed from the point of geology, and divided the surface deformation caused by coal mining underground into four types according to the different degree of surface deformation, they are light degree deformation, middle degree deformation, serious degree deformation and serious area deformation.(2) The concept of "Land Rehabilitation " at home and abroad are discussed, and pointed out that during three concepts about land rehabilitation put forward by American experts "Land Restoration" " Land Reclamation" "Land Rehabilitation", the most suitable to our national state is "Land Rehabilitation".(3)The essentiality of land rehibilitation and ecological reestablishment are discussed,and pointed out that that land rehibilitation of westland in mining area is the important measure to get the goal of land rehibilitation. The goal of ecological reestablishment is to build the sustainable ecological system which suited to the natural and economic terms in Zhaizhen Town.(4) The present condition of land rehibilitationat home and abroad are discussed . 2. the potentiality of subsidence lands of coal extraction in Zhaizhen TownZhaizhen Town lies on the west part of Xintai City and far away ten kilometers from the city.Through analyzing the statistical data of subsidence lands of coal extraction in Zhaizhen Town, twelve indexes are chose to form the evaluation form system of potentiality of land rehabilitation considered the nature geographic and society economic states in the area, they are geomorphic type before subsidence, the contents of soil organic matter, soil quality, phreatic burial depth, irrigation condition, land utilization condition, surface water deposited states, the degree of surface deformation, Gross Domestic Product(GDP) per capital, cultivated lands per capital and position condition. Using this evaluation index system, the different potentiality grades area of subsidence lands of coal extraction are divided and detailed utilization model of each potential type area is put forward,during which the first grade area accounts for 23.81% of the total area.the second grade accounts for 64.29% which is the typical potential grade of this area.the third grade accounts for 11.90%.Then connecting the different potentiality grade lands with different suitability of land utilization grade making sure of models of different potentiality grade of land rehabilitation in Zhaizhen Town.3.the land utilization structure optimization of subsidence areas of coal extraction in Zhaizhen TownThe results of land utilization structure got by potentiality and suitability valuation of subsidence lands of coal extraction have mainly considered the nature geographic factors ,but they are not the mist optimal land utilization structur Building linear planning model in this thesis to make sure the optimal ratio of different land rehabili...
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