Research Article
Numerical Study on Infrared Optical Property of Diffuse Coal Particles in Mine Fully Mechanized Working Combined with CFD Method
Table 6
Transmittance variation of dust in vertical direction.
| Distance (m) | Height (m) | Transmittance | Short wave (2 m) | Medium wave (5 m) | Long wave (20 m) | Respirable dust | Total dust | Respirable dust | Total dust | Respirable dust | Total dust |
| 5 | 0.5 | 0.3189 | 0.1856 | 0.6658 | 0.2766 | 0.7809 | 0.5355 | 1.5 | 0.2289 | 0.1438 | 0.6374 | 0.2993 | 0.7317 | 0.5302 | 2 | 0.601 | 0.5361 | 0.8392 | 0.6952 | 0.8961 | 0.8293 |
| 15 | 0.5 | 0.3219 | 0.2653 | 0.7068 | 0.5162 | 0.7864 | 0.6877 | 1.5 | 0.2704 | 0.2079 | 0.6722 | 0.4375 | 0.758 | 0.6325 | 2 | 0.5638 | 0.4997 | 0.8447 | 0.6925 | 0.8861 | 0.8165 |
| 25 | 0.5 | 0.5696 | 0.5123 | 0.8514 | 0.7155 | 0.8884 | 0.8264 | 1.5 | 0.4446 | 0.4054 | 0.7936 | 0.6819 | 0.8434 | 0.7918 | 2 | 0.5332 | 0.4799 | 0.8474 | 0.7124 | 0.8773 | 0.8165 |
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