The Study On Dynamic Prediction Theory Of Mining Subsidence And It's Parameters

Ground movement and deformation caused by mining subsidence is a nonlinear process with time and space. In this paper, according to the measured data of the 5478Y working face in Kailuan Mining area, it analyzes the dynamic behavior and trajectory of surface points and the distributing rules of movement and deformation of the surface of maior cross section during the mining; and summarizes the affect that the geological and mining factors on the movement and deformation of the surface. It constructs the formula of the dynamic movement and deformation on maior cross section and at any point on the surface based on Knothe time function, and it realizes visualization of predicting result in the Matlab software. With the data of geological and mining and predicting parameters of 11 working face in kaiLuan Mining area, analyzing the relationship between the mining depth, mining height, angle, the depth of loose layer and so on and predicting parameters, the paper establishes numerical model for dynamic predicting parameters, and using regression analysis, and it establishes the formula of dynamic predicting parameters for kaiLuan Mining area .Finally, based on Knothe time function, it uses dynamic prediction method to Predicts dynamic ground movement and deformation for Fu 271 working face, and analyzes the precision of the predicting results, and confirmes that the method can satisfy the security needs, and has greater practical value to guide the design and selects the protection measures of buildings of surface mining.