Hierarchic Analysis Method to Evaluate Rock Burst Risk

Table 15

Coal rock burst tendency and quantitative scores.

Elastic energy index	<1.5	1.5–3.0	3.0–5.0	5.0–7.0	>7.0
Dynamic failure; time/ms	<2.0	2.0–3.0	3.0–4.0	4.0–5.0	>5.0
Scores	2	4	6	8	10