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Nie W, Jiang C, Sun N, Guo L, Liu Q, Liu C, Niu W. CFD-based simulation study of dust transport law and air age in tunnel under different ventilation methods. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:114484-114500. [PMID: 37861825 DOI: 10.1007/s11356-023-30286-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 10/02/2023] [Indexed: 10/21/2023]
Abstract
To solve the problem of high-concentration dust pollution in a bored tunnel, we conducted a simulation study on the dust transport law and air age of the wind flow in a bored tunnel under different ventilation methods. Air age was innovatively introduced as an index for evaluating tunnel air quality. The results show that dust pollution is serious under conditions of press-in ventilation, which is unfavorable to personnel operations. Following the installation of an on-board dust-removal fan, an effective dust-control air curtain forms in the tunnel, and the high-concentration dust is essentially controlled within the range of Z = 13 m from the working face. The dust concentration in the working area on the left side of the tunnel is CD < 200 mg/m3, and the dust-control effect is obvious. At the same time, the air age on both sides of the tunnel is reduced by 35.5% following the use of the on-board dust-removal fan. Taking into account dust control by ventilation and dust removal by fan, spraying dust reduction measures are added, and we developed automated wind-mist synergistic wet high-frequency oscillation dust-capturing technology for tunnel boring. This could effectively improve the problem of high levels of coal dust pollution in tunnels.
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Affiliation(s)
- Wen Nie
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Shandong Province, Qingdao, 266590, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Chenwang Jiang
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Shandong Province, Qingdao, 266590, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Ning Sun
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Shandong Province, Qingdao, 266590, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Lidian Guo
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Shandong Province, Qingdao, 266590, China.
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Qiang Liu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Shandong Province, Qingdao, 266590, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Chengyi Liu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Shandong Province, Qingdao, 266590, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Wenjin Niu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Shandong Province, Qingdao, 266590, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
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Nie W, Liu X, Peng H, Liu C, Hua Y, Guo L. Numerically simulated behavior of diesel particulate matter emitted by hydraulic support transporters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:3166-3181. [PMID: 35941507 DOI: 10.1007/s11356-022-22062-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 07/13/2022] [Indexed: 06/15/2023]
Abstract
WC55-Y hydraulic support transporters allow an efficient transport of support equipment in fully mechanized mining faces. However, the diesel particulate matter (DPM) emitted by these transporters seriously pollutes the air environment along mine roadways, endangering the health of coal mine workers. In this paper, we simulated the diffusion dispersion of DPM during the functioning of a WC55-Y hydraulic support transporter (emitting high amounts of exhaust pollutants) by computational fluid dynamics, identifying high DPM concentration zones. While the transporter was driven along a coal auxiliary transportation roadway, the diffusion-dispersion characteristics of DPM changed: DPM reached a long horizontal diffusion distance and a high concentration. We found that to avoid the inhalation of DPM and reduce its potential harm, coal mine workers should keep a distance of at least 21.27 m from the hydraulic support transporter while the vehicle runs along the roadway. Moreover, according to our simulation, the operators responsible for disassembling the hydraulic support transporter should wear protective equipment with good filterability while unloading it. Overall, the findings of this study can be applied to outline new work practice guidelines and design new optimum auxiliary ventilation for reducing underground miner exposure to DPM.
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Affiliation(s)
- Wen Nie
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong, Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
| | - Xiaofei Liu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong, Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
- Licheng Urban Development Group, Jinan, 250109, Shandong Province, China
| | - Huitian Peng
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China.
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong, Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China.
| | - Chengyi Liu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong, Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
| | - Yun Hua
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong, Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
| | - Lidian Guo
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
- State Key Laboratory of Mining Disaster Prevention and Control Co-Found By Shandong, Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, Shandong Province, China
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Bao Q, Xu J, Nie W, Niu W, Tian Q, Yuan M. Simulation study of the mechanism of mesoscopic adsorption and the evolution of molecular dynamics of a surfactant/polymer composite on the surface of low rank coal. J Mol Graph Model 2022; 116:108276. [PMID: 35926334 DOI: 10.1016/j.jmgm.2022.108276] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 07/08/2022] [Accepted: 07/11/2022] [Indexed: 12/15/2022]
Abstract
In this paper, the head group, tail group, and main chain of a single type of surfactant were constructed by a mesoscopic simulation, and the interaction between the simulated surfactant and coal dust both on its own and in a composite with polyacrylamide (PAM) was studied. The molecular adsorption behavior of cetyltrimethylammonium chloride (CTAC) surfactant mixed in different ratios with PAM was also experimentally characterized. The results showed that. From the above results, we can see that CTAC and PAM can form spherical, rod-shaped, and wormlike aggregates and a network structure as their volume fraction increases in an aqueous solution. The energy spectrum showed that when CTAC adsorbed on the surface of the coal, the content of carbon on the surface decreased from 63.8 to 50.4%, and the content of oxygen increased from 35.2 to 41.8%. The study on the adsorption mechanism of surfactants and polymers on the surface of low rank coal and the hydrophilicity of low rank coal is of great significance in developing efficient dust prevention technology for low rank coal to reduce coal dust pollution.
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Affiliation(s)
- Qiu Bao
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Jingzhi Xu
- Science and Technology Industry Management Division (National University Science Park Management Office), Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Wen Nie
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
| | - Wenjin Niu
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Qifan Tian
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Mingyue Yuan
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
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Nie W, Guo L, Liu Q, Hua Y, Xue Q, Sun N. Study on the coupling pollution law of dust and gas and determination of the optimal purification position of air duct during tunnel excavation. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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