Abstract: Sanshandao Gold Mine is the first hard rock mine carrying out under-sea mining in China, which adopts the mechanical upward horizontal slice stoping-filling method with pointed pillars.ANSYS finite element numerical simulation method was used to calculate and analyze quantitatively the distribution of the stress, displacement and plastic zone of the stop roof, floor and point pillars in the different mining steps after the filling, and to simulate their dynamic change process and regularity with the stoping stress and strain of each step.The analysis results were used in the practical engineering, providing a technical support to an efficient safety under-sea mining in Xinli mineral zone of Sanshandao Gold Mine.

Key words: Numerical simulation, Different stoping steps, Dynamic analysis