Prediction of mining subsidence in mountain area overlaid with thick loess bed

Based on the data of observation station of surface movement in Tongchuan mining area, the paper concretely analyzes the characteristics of surface movement and deformation in mountain area, obtains final movement and deformation curve in strike and oblique profile and establishs the expressions of subsidence and displacement in strike profile.In the paper, the surface movement and deformation in mountain area is regarded as the overlap of mining branch and land slip branch effected by mining.The paper uses effect function overlap method to determine prediction parameters on this geological conditions.detaches land slip effect parameter P (x) in mountain area and makes quantitative analysis and prediction examination of land slip effect.Predicted and actual results are approximately equal.The method of calculating parameters and parameters can be referred on analogical geological conditions.