The measurement of in-site crustal stresses are carried out in Yan Shi Tai coal mine.The outburst-proneness of 6# coal seam are studied with five indexes. Based on the strength testing of coal,the strength criterion is set up. The energy criterion is put forward in the light of engineering practice.According to the "three criteria" mechanical model,the prediction of danger zone of coal burst of 6# coal seam in this mine is carried out.