Behaviors of land reclamation in subsidence land based on energy theory

In this paper, behavioral characteristics of land reclamation on the basis of energy theory were revealed to provide a scientific basis for decision-making and direction of land reclamation in mining subsidence area. In the case study on the north mine reclamation project in Xuzhou City, field test and energy theory analysis were selected to analyze energy changes of subsidence area before and after reclamation. The research results showed that land reclamation is the people-oriented act, relying on natural resources and ecosystem energy flow, aiming to achieve and enhance the eco-economic system functions in mining subsidence area; In order to restore and enhance regional productivity as value-oriented land reclamation behavior can effectively improve the service functions of region and product, its eco-benefit was 361.61×10¹⁶sej/a; After reclamation a certain area of fish ponds and water storage areas increased to meet production requirements, and also to improve regional water conservation features, their eco-benefit were 4.6×10¹⁶sej/a; By adjusting land-use structure, land-use layout and land-use behavior of mining subsidence area, land reclamation behavior complied the energy flow and conversion of eco-economic system to raise the energy.