Extension Evaluation Model of Land Destructiondegree in Mining Area and its Application

Taking Renjiazhuang coal mine as the object of study, this paper carries on evaluation to destruction degree in this area by using extension theory and establishing evaluation extension model of land destruction in mining area. Results show that severe destruction area of collapse land in Renjiazhuang coal mine is 112.86hm, moderate destruction area is 372.27hm, light destruction area is 723.42 hm, spoiled land belongs to light destruction and its area is 7.09 hm. Our study provides evidence for making countermeasures in destruction land reclamation in mining areas, choosing reclamation technology and carrying on suitability evaluation, etc. It is proved that the extension theory is feasible in evaluation of land destruction in mining areas.