Table 6 Acoustic emission cumulative ringing counts of coal samples with differe water immersion times.

From: Study on the strength deterioration characteristic and damage model of coal pillar dams with repeated water immersion in underground reservoirs

Water immersion times

Acoustic emission cumulative ringing count (104)

4 MPa

8 MPa

0

12.20

14.14

1

8.77

10.53

2

7.02

9.48

3

5.56

7.77

4

4.44

6.96

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