Study of Acoustic Emission and Mechanical Characteristics of Coal Samples under Different Loading Rates

Figure 8

The relationship curve among AE counts, AE cumulative counts with times of coal samples under different loading rates.

(a) AE counts and cumulative counts of coal samples M1 (0.001 mm/s)

(b) AE counts and cumulative counts of coal samples M6 (0.002 mm/s)

(c) AE counts and cumulative counts of coal samples M9 (0.005 mm/s)