Abstract: Based on the investigation data of a mining area, a distance discriminant model of stability prediction of goaf was established. Some main factors which influence goaf were selected as discrimination factor, then it took measured sample as training samples, discriminantwaiting sample was classified by establish corresponding linear discriminant function. Study result indicates that distance discriminant analysis model is an effective method of goaf prediction which could be used in practical engineering.

Key words: Goaf, Prediction, Distance discriminant analysis