Table 4 The R2 and D for different phases of samples.

From: Investigation of the acoustic emission and fractal characteristics of coal with varying water contents during uniaxial compression failure

Stage

Sample A1

Sample B1

Sample C1

Sample D1

Sample E1

R2

D

R2

D

R2

D

R2

D

R2

D

3

0.988

3.350

0.990

0.853

0.988

0.871

0.968

1.028

0.955

0.959

4

0.987

2.870

0.995

0.785

0.998

0.726

0.997

0.876

0.948

0.759

5

0.901

0.981

0.959

0.836

0.991

0.728

0.995

0.751

0.925

0.461

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