Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 29, Issue 23, Pages 34943-34954Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-18623-2
Keywords
Tunnel; Fully mechanized rock tunnelling face; Dust suppression technology; Forcing air curtain
Categories
Funding
- National Natural Science Foundation of China [51874191]
- National Key R&D Program of China [2017YFC0805201]
- Qingchuang Science and Technology Project of Shandong Province University [2020KJD002]
- Taishan scholars project special funding [TS20190935]
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This study investigated the dust suppression technology of the forcing air curtain in fully mechanized rock tunnelling faces in coal mines. The research introduced the mechanism of dust diffusion controlled by the forcing air curtain and conducted numerical simulations to analyze the formation of the forcing air curtain and its influence on dust diffusion. In addition, a dust suppression technology using the forcing air curtain was designed and tested in a coal mine tunnel, showing promising results in reducing dust concentrations.
To effectively reduce high dust concentrations and keep clean air in fully mechanized rock tunnelling faces in coal mine, this study carried out a research of dust suppression technology of the forcing air curtain. First, the mechanism of dust diffusion controlled by the forcing air curtain was introduced in this study. Then, numerical simulations of the formation of the forcing air curtain as well as the influence for dust diffusion under the different distance between forcing air duct outlet and heading end were carried out. Moreover, a dust suppression technology of the forcing air curtain was designed and tested in a fully mechanized rock tunnelling face of southern return air tunnel which was located in the Tangkou coal mine of China. It shows that the numerical simulation results were in good agreement with the in situ tests. The average removal rate of total and respirable dust could reach up to 95.1% and 96.1%, respectively, at manned working areas in the tunnel. Research results show that the dust suppression technology of the forcing air curtain is an effective method of dust control in fully mechanized rock tunnelling faces.
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