Abstract: The tests of similar material model based on the dip angles variation of coal seam was designed.With the aid of the close range industry photogrammetry system，the collected data are treated to obtain the surface subsidence curve with different coal seam dip angles.The difference of surface subsidence curves with the variation of dip angles of coal seam are analyzed，and the prediction model is modified based on probability integral method.The function fitting is realized by MATLAB software to obtain the new prediction model which all suitable for coal mining of gently inclined seam and steep seam.

Key words: Mining subsidence, Dip angles variation of coal seam, Similar material model, Subsidence prediction