Table 3 Fractal dimension table of mining-induced fracture development in 5# coal seam.

From: Study on fracture development and failure characteristics of repeated mining overlying strata in multi-coal seams with faults

Excavation distance

Fitting relationship

Fractal dimension

Correlation coefficient

20 m

\(\ln N=10.3185 - 1.8134\ln r\)

1.8134

0.9865

40 m

\(\ln N=10.3385 - 1.8181\ln r\)

1.8181

0.9931

60 m

\(\ln N=10.3661 - 1.8238\ln r\)

1.8238

0.9911

80 m

\(\ln N=10.3264 - 1.8143\ln r\)

1.8143

0.9757

110 m

\(\ln N=10.3013 - 1.8097\ln r\)

1.8097

0.9643

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