For the mining area lowering continuously with unceasing development of mining,the safety of deep mining is becoming a very important problem in Longshou Mine of Jinchuan Company.In the view of the geological condition,the technical conditions and the present state of mining in this mine,the 3D model for the adopted down hexagon drift mining method is build,and the stability of upper filling and surrounding rock is analysed using numeric using numerical simulation method,so as to set bases for the safety product in the deep in this mine.