Table 4 Fractal dimension of coal samples before and after solution treatment.

From: Effects of surface tension and contact angle on pore structure development of coal samples under chemical solution erosion

Number

Dt

Da

Ds

Raw

Treated

Raw

Treated

Raw

Treated

1#

2.4243

2.4108

0.4961

0.5863

2.9796

2.9725

2#

2.3665

2.3520

0.5887

0.6242

2.9680

2.9622

3#

2.3859

2.3707

0.5696

0.5477

2.9799

2.9750

4#

2.3750

2.3453

0.8535

0.8245

2.9645

2.9563

5#

2.3756

2.3417

0.6188

0.6240

2.9693

2.9559

6#

2.3346

2.3071

0.5489

0.3692

2.9329

2.9285

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