Research progress of reclaimed soil quality in mining subsidence area

Land cultivation of arable land is not only an important supplementary measures, but also the main measures to improve the ecological environment of the mine area. The quality of reclamation soil, mainly including the methods of soil restructuring, the change of physical-chemical features and the organism activation, was analyzed at present, there are two ways to restructured soil: filling and infilling reclamation. Infilling reclaimed includes land leveling, terracing, deepen and pad shallow and so on. According to the different infilling material, filling reclamation is classified into fly ash, waste pile, river and lake mud and rubbish filling. The chemical feature change of the restructured soil mainly focus on the research on the changing of soil bulk, water content, structure and chief nutrients. The filling soil by fly ash and waste pile has the possibility that polluted by heavy metal. Some research verifies that the microorganism activation of restructured soil is worse than that of big field soil. On the basis of present research, this research proffers the problems existed in the soil reclamation studies at present and the emphasis in the furth study.