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.