Table 4 Percentage of dust quantity in different particle size ranges.

From: Dust distribution characteristics of the breathing zone in the walkway area of fully-mechanized mining face: a case study

Sampling spots

Particle size ranges (μm)

0–5

5–10

10–20

20–50

50–100

M1

63.64%

30.97%

4.93%

0.46%

0.00%

M2

72.15%

23.45%

4.02%

0.39%

0.00%

M3

67.85%

27.03%

4.46%

0.66%

0.00%

M4

60.30%

26.04%

9.82%

3.60%

0.24%

M5

62.10%

24.25%

9.79%

3.86%

0.00%

M6

60.70%

28.63%

9.22%

1.21%

0.24%

M7

70.42%

21.76%

6.49%

1.34%

0.00%

M8

62.79%

32.65%

4.08%

0.48%

0.00%

M9

73.03%

22.68%

3.60%

0.69%

0.00%

M10

61.27%

35.04%

3.52%

0.18%

0.00%

M11

73.69%

24.81%

1.49%

0.00%

0.00%

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