Microseismic Response Characteristics Induced by Mining Activities: A Case Study

Table 3

Comparison of MS signals with different energy levels monitored in Liyazhuang Coal Mine.

Energy levels (J)	Duration (ms)	Amplitude (m/s)	Attenuation rate	Frequency bands	Main frequency (Hz)
10^4	800–1000	(0.6–6.5) × 10^−4	Slow	0–200	40–70
10^3	600–800	(0.2–0.5) × 10^−4	Fast	0–160	10–75
10^2	550–750	(0.2–0.6) × 10^−4	Faster	0–120	15–80