Abstract: Based on the geological survey and samplings above the Datuanshan middle -580 m，and in order to make full use of the current mining preparation system，it is planning to make the stoping scheme based on the stoping width by means of FLAC3D Numerical simulation without the gob backfilling. Then，the stability analysis is made for parts of or all stopes at the lower panel under high stress conditions. Through research on the internal stress and displacement rule of the pillar，and combining with the early rock mechanics theory，the optimum scheme is got to ensure the smooth mining.

Key words: Big panel, High stress, FLAC3D, Numerical simulation, Pillar recovery