Study on laws of overburden movement parameters under fully- mechanized mining conditions in shallow coal seam of Dongsheng Mining Area

In order to study the relationships and characteristics between the surface movement parameters and geological mining conditions of Dongsheng Mining Area,based on the study results of the surface movement law of 12 working faces in Dongsheng Mining Area,the regression analysis method of Matlab and SPSS were used to study the relationships between the surface moving deformation angle parameters caused by coal seam mining in Dongsheng Mining Area and the calculation parameters of surface displacement deformation by probability integral method.The relationships between surface movement parameters and related geological mining conditions in Dongsheng Mining Area was thus established.The results show that boundary angle,displacement angle and crack angle are highly correlated with the ratio of bedrock thickness and mining thickness; the subsidence coefficient has a good correlation with coal seam thickness and bedrock thickness; the horizontal movement coefficient is correlated with loose layer thickness and bedrock thickness; the main influence angle tangent is well correlated with the height of the mining and the thickness of the bedrock;and the offset coefficient of the inflection point has no significant relationship with the geological mining conditions,but the variation range is wihtin 0.04～0.37,which can be used for the prediction of surface movement parameters in Dongsheng Mining Area.