Table 4 The variation of cumulative AE counts with the anisotropy angle of coal specimens under various Cyclic loading-unloading rates.

From: The influence of cyclic loading-unloading rates on the uniaxial mechanical anisotropy of coal

Anisotropy angle (º)

Cumulative AE counts (×105)

0.025 MPa/s

0.050 MPa/s

0.100 MPa/s

0º

1.77

2.23

3.54

22.5º

1.18

2.14

1.88

45º

2.95

2.80

3.74

67.5º

5.29

6.36

4.13

90º

8.97

7.25

10.87

Average value

4.03

4.15

4.83

Back to article page