Research Article
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 | √ | √ | √ | √ | √ | √ | √ | — | √ | √ | √ | — | √ | √ | √ |
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