Table 3 Fractal dimension of coal samples.

From: An analysis of impact load and fragmentation dimension to explore energy dissipation patterns in coal crushing

Specimen type

No

Average fractal dimension D

Average correlation coefficient R2

Burst-prone coal sample

X-1

1.3688

0.9371

X-2

1.6990

0.9634

X-3

1.7207

0.9392

X-4

2.0823

0.9367

X-5

2.0232

0.9534

X-6

2.1413

0.9424

Non-burst-prone coal sample

Y-1

2.3094

0.9794

Y-2

2.3970

0.9564

Y-3

2.4946

0.9672

Y-4

2.5467

0.9438

Y-5

2.5723

0.9578

Y-6

2.6030

0.9962

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