 This paper examined the evaluation of rockburst tendencies in hard rocks using two non-energy indexes, Brittleness Indicator, B2, and Strength Decrease Rate, SDR, and developed classification criteria for each index. The authors found that the B2 index was more sensitive to changes in loading rate than the SDR index and suggested that the displacement control should be used when measuring the B2 index. Additionally, they determined that four grades of rockburst tendency could be classified according to the test results. This article was authored by Kuindu, Somayong, Jianzhou, and others.