Numerical simulation and engineering application of multistage atomization dustfall at a fully mechanized excavation face

Zhang Guobao; Zhou Gang; Zhang Lichao; Sun Biao; Wang Naiguo; Yang Houqin; Liu Wei

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Numerical simulation and engineering application of multistage atomization dustfall at a fully mechanized excavation face

机译：多级雾化除尘在综合机械化挖掘面上的数值模拟与工程应用

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To explore the effect of atomization and dustfall at a fully mechanized excavation face with a multistage external spray, numerical simulation of an airflow-dust field and airflow-droplet field was carried out using the theory of computational fluid dynamics (CFD). The migration and distribution of dust and droplet particles with airflow were analyzed, and the effect of multistage atomization was explored via numerical simulation and field measurements. The results show that dust mass concentrations up to 2000 mg/m(3) are generated near the head and gradually diffuse over 35 m on the downwind side of the roadheader, and the average droplet concentration exceeds 0.2 kg/m(3). The first, second and third stages of external spray settle a large portion of the high dust concentration. The fourth stage of external spray settles the dust at the point of transfer, and the fifth stage of external spray forms a water curtain at the back of the roadway to minimize dust diffusion. The field measurement shows that the multistage external spray dust suppression system can effectively reduce the dust concentration at the 33(down)03 fully mechanized face, with dust removal rates for total dust and respirable dust of 76.04% and 84.3%, respectively. The dustfall effect is remarkable.

机译：为了在具有多级外部喷射的全机械挖掘面上雾化和除尘的影响，使用计算流体动力学（CFD）进行气流灰尘场和气流场的数值模拟。分析了具有气流的灰尘和液滴颗粒的迁移和分布，通过数值模拟和现场测量探索了多级雾化的效果。结果表明，在头部附近产生高达2000mg / m（3）的粉尘质量浓度，并且在路标的下行侧逐渐漫射超过35米，平均液滴浓度超过0.2kg / m（3）。外部喷雾的第一，第二和第三阶段沉降大部分高粉尘浓度。外部喷雾的第四阶段在转移点处沉淀灰尘，外部喷雾的第五阶段在道路背面形成水幕，以最大限度地减少粉尘扩散。现场测量表明，多级外部喷涂抑制系统可以有效地降低33（下）03综采性面上的粉尘浓度，除尘速率分别为76.04％和84.3％的可吸尘。除尘效果显着。

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来源
《Tunnelling and underground space technology》 |2020年第10期|103540.1-103540.13|共13页
作者
Zhang Guobao; Zhou Gang; Zhang Lichao; Sun Biao; Wang Naiguo; Yang Houqin; Liu Wei;
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作者单位

Shandong Univ Sci & Technol Coll Safety & Environm Engn Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Minist Sci & Technol State Key Lab Min Disaster Prevent & Control Cofo Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Coll Safety & Environm Engn Dept Safety Engn 579 Qianwangang Rd Qingdao Shandong Peoples R China;

Shandong Univ Sci & Technol Coll Safety & Environm Engn Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Minist Sci & Technol State Key Lab Min Disaster Prevent & Control Cofo Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Coll Safety & Environm Engn Dept Safety Engn 579 Qianwangang Rd Qingdao Shandong Peoples R China;

Shandong Univ Sci & Technol Coll Safety & Environm Engn Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Minist Sci & Technol State Key Lab Min Disaster Prevent & Control Cofo Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Coll Safety & Environm Engn Dept Safety Engn 579 Qianwangang Rd Qingdao Shandong Peoples R China;

Shandong Univ Sci & Technol Coll Safety & Environm Engn Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Minist Sci & Technol State Key Lab Min Disaster Prevent & Control Cofo Qingdao 266590 Peoples R China|Shandong Univ Sci & Technol Coll Safety & Environm Engn Dept Safety Engn 579 Qianwangang Rd Qingdao Shandong Peoples R China;

Inner Mongolia Energy Co Ltd Liabil Shandong Energy Xinwen Min Grp Otog Qianqi 016299 Peoples R China|Inner Mongolia Energy Co Ltd Liabil Xinwen Min Grp Otog Qianqi 016299 Peoples R China;

Shandong Energy Zaozhuang Min Grp Qiwu Coal Mine Weishan 277606 Peoples R China|Qiwu Coal Mine Zaozhuang Min Grp Weishan 277606 Peoples R China;

Shandong Witlab Min Equipment Ltd Co Liangshan 272619 Peoples R China;

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正文语种 eng
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关键词
Fully mechanized excavation face; Multistage atomization; Spray dustfall; Numerical simulation; Engineering application;

机译：综合机械化挖掘面;多级雾化;喷雾除尘;数值模拟;工程应用;

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机译：数值模拟技术在爆破开挖工程中的应用。

Numerical simulation and engineering application of multistage atomization dustfall at a fully mechanized excavation face

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