Air Curtain Dust Removal Device Design and Dust Prevention Strategy in Heading Face

Table 2

Arrangement of measuring spots.

Test item

Distance from measurement spot to heading face (m)

14.3

20

25

35

40

50

60

65

70

80

90

95

100

110

120

Total dust concentration

√

√

√

√

√

√

√

—

√

√

√

—

√

√

√

Respiratory dust concentration

√

√

√

√

√

√

√

—

√

√

√

—

√

√

√