| Coal mine | Place | Comprehensive dust-proof technology | Related parameters | Dust suppression effect | |||
| Dust concentration mg/m3 | Dust removal rate | ||||||
| Total | Respirable | Total | Respirable | ||||
| Zhangjiamao Coal Mine | Fully mechanized mining face | Coal seam water injection + ventilation and dust removal + return air tunnel combined water purification curtain | Water injection pressure 5 - 6 MPa, time 2 h | 4.37 | 2.26 | 70.6% | 69.7% |
| Shuangyashan mining area | Fully-mechanized mining face | High-pressure water injection + high-pressure spray | 1) The water injection pressure is 18 MPa, the time is 60 h, and the drilling distance is 15 m. | 98 | 30 | 94.8% | 92.7% |
| Xinzhi Coal Mine | Fully mechanized excavation face | Wind and fog double curtain + dust suppressant spray | — | 28.1 | 16.5 | 94.8% | 93.9% |
| Donglin Coal Mine | Fully-mechanized mining face | Sectional sealing water injection + foam dust reduction + automatic spray dust reduction | 1) The depth of 10 m water injection drilling hole is 1 m and 1.6 m from the top and bottom plate, respectively, and the water injection pressure is 12 MPa 2) Foam expansion ratio 70; foaming agent addition ratio 3‰ | 85 | 38.2 | 95.8% | 94.8% |