期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 10, 期 3, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2022.107732
关键词
Fully mechanized coal dust; Ascensional; descensional ventilation; Pollution law; DPM-DEM model; Automatic spray dust suppression
资金
- National Natural Science Foundation of China [51904171, 52004150]
- Qingchuang Science and Technology Project of Universities in Shandong Province, China [2019KJH005]
- Science and Technology Project of Qingdao City, China [20-3-4-2-nsh]
- Outstanding Young Talents Project of Shandong University of Science and Technology [SKR22-5-01]
- Basic Research on Air Purification and Occupational Health of Coal Mines in Shanbei Mining Area & Key Technical Equipment and Demonstration [SMHLL-JS-YJ-2020006]
This study numerically simulated the dust migration law under ascensional and descensional ventilation conditions and proposed corresponding automatic spray control schemes. The results showed that dust migration distance and difference increased with time under both ventilation conditions, and the impact on the breathing belt was different.
To understand the problem of differences in the dust migration law of ascensional and descensional ventilation, this study numerically simulates the dust migration law under the condition of ascensional and descensional ventilation, and proposes corresponding automatic spray control schemes. The results show that under the influence of wind flow, the migration distance of dust under ascensional ventilation was longer than that under descensional ventilation at the same time, and the distance difference of dust migration between ascensional and descensional ventilation also increased with the evolution of time. Among them, the distance differences at 10 s, 25 s, 50 s and 75 s were 2 m, 7 m, 9 m and 14 m respectively. The lift of the ascensional wind hindered dust deposition, which caused the dust at 0-15 m on the downwind side of the shearer to seriously affect the breathing belt, with an average dust concentration of 1683.3 mg/m(3) . The thrust of the descensional wind caused the roof near the moving support to seriously affect the breathing belt, with an average dust concentration of 1435.1 mg/ m(3) .
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