Dynamic Reclamation Methods for Subsidence Land in the Mining Area with High Underground Water Level

Dynamic reclamation for subsidence land is a development trend of ecological restoration in the mining area. It emphasizes that treatments should be taken during or before land damage to control the ecological degradation. Because dynamic reclamation is a complex problem, there still exist many challenges that have to be studied for practical application. In this paper, taking subsidence land in the area with high underground water level as an example, according to the requirements of land use and economic development, key techniques for dynamic reclamation are analyzed based on mine subsidence theories. The research proposes a general mode for dynamic reclamation, and provides a method for calculating the control time of soil excavation, and puts forth an optimization thought for land use, then establishes a procedure for soil reconstruction. The results show that dynamic reclamation can reduce the cost and shorten the land waste time, and enhance the sustainable development ability of the mining area.