Table 1 Curvature, fissure width and F/(2kπ) mean*.

From: Hard particle force in a soft fracture

Fissure No.

JRC

Curvature Mean \(\bar{\theta }\)

Fissure width mean \(\bar{h}\) (mm)

F/(2kπ) Mean

1

0–2

5.44 × 10−3

0.218

5.94 × 10−6

2

2–4

6.82 × 10−3

0.273

5.44 × 10−6

3

4–6

8.11 × 10−3

0.324

4.86 × 10−6

4

6–8

8.87 × 10−3

0.355

4.61 × 10−6

5

8–10

1.31 × 10−2

0.522

3.32 × 10−6

6

10–12

1.57 × 10−2

0.628

2.95 × 10−6

7

12–14

2.33 × 10−2

0.930

2.00 × 10−6

8

14–16

3.08 × 10−2

1.230

1.71 × 10−6

9

16–18

3.59 × 10−2

1.430

1.64 × 10−6

10

18–20

4.61 × 10−2

1.830

1.27 × 10−6

  1. *The Fissure width mean \(\bar{h}\) is the average of h is the average of all of h, including the h > 2 R(x2 − R2)0.5. The average of F is the average of all of F ≠ 0.
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