Abstract：After 40 years¢ mining in Chengchao iron mine，now it is coming into deep mining. To predict the possibility and intensity of rockburst，the author obtained rocks from the depth underground －430 to －700 m. Based on systematical mechanical experiments of rocks，various prediction criteria for rockburst are brought forward through many testing methods. With the theoretical methods，rocks which have the different possible intensities for rockburst are checked up by the criteria，and some types of rocks in the mine which has high possibility and severe intensity are confirmed. At last，combined with the comprehensive prediction methods in fuzzy mathematics，synthesized prediction upon those criteria is made that the orientation of rockburst and critical depth are ascertained in the mass，which can be the basic theory in the mining design and rockburst prediction.
