Table 5 Flow resistance factor prediction and numerical simulation prediction.

From: Calculation model for ventilation friction resistance coefficient by surrounding rock roughness distribution characteristics of mine tunnel

Type

Line1

Line2

Line3

Line4

Line5

Line6

Line7

Line8

Line9

α × 10–3

6.272

6.114

6.103

6.098

8.114

4.711

7.114

6.114

6.361

α × 10–3 (Colebrook)

6.215

6.543

6.606

6.146

7.873

4.996

7.233

6.543

7.870

\(\delta\)

0.9%

7%

8%

0.7%

2.9%

6.1%

1.6%

7.0%

8.0%

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