Mechanism of Rock Burst Revealed by Numerical Simulation and Energy Calculation

Table 2

Critical criterion of rock burst under different FSF values.

Stage	ratio of FSF	Critical ΔP value (MPa)	Critical PPV value (m/s)
Pregnant stage	1 to 2.5	＞3	＞0.8
Growth period	2.5 to 2.75	＞1	＞0.27
Upheaval period	2.75 to 2.93	＞0.1–1	＞0.027