Abstract: The spatial structure of the tungsten mine in southern Jiangxi resembles five-floor construction due to its complicated metallogenic conditions. Decades of open-stope mining resulted in many mined-out areas. The stope underground pressure activities of different sizes occur frequently. This paper studies the ground pressure investigation methods and focuses in accordance with ground pressure occurrence features of the tungsten mine in southern Jiangxi. Factors influencing mined -out areas' stability are analyzed. Evaluation method of mined -out stability is presented.