State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China.
College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
Environ Sci Pollut Res Int. 2018 Mar;25(8):7808-7822. doi: 10.1007/s11356-017-1106-8. Epub 2017 Dec 30.
To understand the impacts of the axial-to-radial airflow quantity ratio (denoted as R) and the suction distance (denoted as D) on air curtain dust control in a fully mechanized coal face, the 3610 coal face in Jiangzhuang coal mine was numerically simulated in this study. A mathematic model was established to describe the airflow migration and dust diffusion in a coal face, and a scaled physical model was constructed. The comparison between simulation results and field measurements validated the model and the parameter settings. Furthermore, the airflow migration and dust diffusion at various R and D are analyzed using Ansys CFD. The results show that a reduction of R and D is conducive to the formation of an effective axial dust control air curtain; the dust diffusion distance decreases with the decrease of both R and D. By analyzing the simulation results, the optimal parameter for air curtain dust control in the 3610 coal face and those faces with similar production conditions is determined as R = 1/9 and D = 2 m. Under the optimal parameter condition, the high-concentration dust can be confined in front of the mining driver within a space 5.8 m away from the coal face.
为了研究轴向与径向风流质量比（记为 R）和抽吸距离（记为 D）对综采工作面空气幕除尘的影响，本研究对江庄煤矿 3610 工作面进行了数值模拟。建立了数学模型来描述工作面风流迁移和粉尘扩散，同时还构建了缩尺物理模型。模拟结果与现场测量结果的对比验证了模型和参数设置的合理性。此外，还使用 Ansys CFD 分析了不同 R 和 D 下的风流迁移和粉尘扩散情况。结果表明，减小 R 和 D 有利于形成有效的轴向除尘空气幕；随着 R 和 D 的减小，粉尘扩散距离也会减小。通过对模拟结果进行分析，确定了 3610 工作面及类似生产条件工作面空气幕除尘的最佳参数为 R=1/9 和 D=2m。在最佳参数条件下，高浓度粉尘可在采煤机前 5.8m 范围内的空间内被限制在采掘面。
