Table 2 Pore connectivity rates for various pore segments in coal samples under different experimental conditions.

From: Experimental investigation into the Impact of Cyclic High Low Pressure Water Immersion on the Pore structure and Mechanical properties of coal

Sample Numbering

Permeability /10−15m2

Connectivity rate /%

< 10 nm

10 ~ 100 nm

100 ~ 1000 nm

> 1000 nm

Total connectivity rate

M1

0.1121

14.11

94.55

97.68

100

38.07

H1

0.1045

8.23

96.77

97.93

100

37.11

H2

0.1899

15.45

97.21

98.65

100

42.53

H3

0.2738

22.36

97.98

100

100

46.33

H4

0.3647

35.85

99.26

100

100

56.18

HL1

0.1116

8.11

97.43

98.87

100

37.46

HL2

0.2133

16. 93

98.57

100

100

45.48

HL3

0.3534

25.88

99.05

100

100

50.37

HL4

0.4224

40.67

99.78

100

100

62.25

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