Abstract: In order to analyze the roof breaking process of the Yellow River North Coal Field under the influence of mining,the discrete element numerical simulation software UDEC was used to simulate the roof breaking process of the thin coal seam stope in the Yellow River North Coal Field.The first step and the periodic step,combined with related theories to make a comparative analysis,enrich and improve the movement law of the overlying strata on the thin coal seam stope,and provide a basis for the control design of the stope roof.

Key words: thin seam, rock pressure, numerical simulation, roof breaking, movement law, strata control