Table 1 Statistical characteristics of the precursors of rock burst events.
From: Early-warning method for rock bursts based on the fractal characteristics of microseismic source
Type | Cumulative energy | Maximum energy | Frequency | Maximum energy proportion |
|---|---|---|---|---|
Temporal precursor characteristics | Minimum values are observed approximately 3–4 days prior to the rock burst event, followed by a steady and progressive increase until the event occurs | The highest recent peak appears 5–6 days before the rock burst event, whereas lower values appear 3–4 days before the event | The minimum value is noted 6–7 days prior to the rock burst event, and lower values appear 3–4 days prior | Higher values are observed 6–7 days prior to the rock burst event, and lower values appear 3–4 days prior |
