Table 1 Samples selection.

From: Effect of immersion height on coal mechanical properties and the mechanism of damage failure

No.

P-wave velocity

No.

P-wave velocity

UCT-1

1.99

UCT-2

1.92

H-00-M

2.00

H-00-N

2.08

H-25-M

2.02

H-25-N

1.95

H-50-M

1.92

H-50-N

1.98

H-75-M

2.09

H-75-N

2.01

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