Study On Disaster-causing Mechanism And Rehabilitation Of Coal Mining Cave In Land

The extensive exploitation of coal resources will result in the subsiding of large-scale coal mining ground, which endanger on the agricultural ecosystem seriously. Social sustainable development requires the research on collapsed ground in mining, which can offer reference for the fact that the local government manages and resumes the ecological environment scientifically and rationally and provide the evident for optimizing the production distribution , avoiding and reducing the emergence of calamity.The coalfield subside area of Feicheng city is one of four karst subsiding areas of our county, whose dimension is very large, so it is very representative. We analysis the law, the characteristics, the cause of formation of collapsed mechanism and their developing trend on the expatiation of actuality of studied coalfield subside area, proposing the measures of preventing, reducing and managing natural calamities in succession.We set forth the thinking and method of this research on the base of the expatiation of the background of studied area.The text is about the in-depth analysis of the collapse shape, characteristic and law of coalfield subside area at the basic foundation of studied area's situation, which indicates that the subsided conformation, characteristic and scale that exploitated coal layer reflecting on the ground are different by reason of dissimilar imbedded conditions of coal seam. The sink speed of each spot in studied subside area is different. And there is the most heavy sinking speed at the most heavy sinking spot. The sinking speed of each upper spot is variational in the whole moving course, which is from small to big at first and then diminished greatly, decaying to the relative stable state finally.