Abstract: Taken the S12186 slope of Sanshandao Gold Mine as the panel method test slope, with a certain width of the slope, the reasonable width of the chamber was a critical factor which affects the safety production.Numerical simulation was done on five different specification of the chamber using FLAC3D, stress distribution, displacement distribution and plastic zone distribution of different plan were analyzed.The optimal specification of stoping is proposed, which provides some reference for safe stoping.

Key words: Panel mining method, FLAC3D, Numerical simulation, Optimal specification