Research on Reclaimed Soil Quality Change in Mining Subsidence Area of Zoucheng City

Underground mining resulted in substantial ground subsidence, and land reclamation can achieve a balance of quantity of total land in these areas, however, obvious changes take place in reclaimed land´s. And the reclaimed quality of the soil is the key to the success of reclamation. The paper bases on different year´s reclaimed land quantity change in Zoucheng City, pH, organic matter, rapidly available K, available P, bulk density, conductivity, alkali-hydrolytic N and tightness be selected as index, combined with relevent coefficient to get weight. In Arcgis statistics analysis and special analysis can be used to get a picture of quality changes of land reclaimed in different years which eventually can to compare and analysis reclaimed land quantity´s temporal and spatial change. With time accumulating, reclaimed land´s quantity improve gradually; arbitrary fertilization and reclamony-machine-related different compaction lead to great relative big regional land quality variation coefficient; Filling materials have impact on top soil and in short term, the impact of fly ash is more positive than cangue´s.