GA-Based Early Warning Method for Rock Burst with Microseismic and Acoustic Emission in Steeply Inclined Coal Seam

Table 2

Rock burst hazard classification.

Integrated early warning index of rock burst, IC	Levels of rock burst risk	State of rock burst risk
0 ≤ IC < 0.25	I	No rock burst risk
0.25 ≤ IC < 0.5	II	Weak rock burst risk
0.5 ≤ IC < 0.75	III	Medium rock burst risk
0.75 ≤ IC ≤ 1	IV	Strong rock burst risk