煤炭技术

针对单一除尘器难以有效解决大风量掘进工作面粉尘污染难题，提出了一种径向控风技术，并与干式过滤除尘系统结合，采用数值模拟方法分析该技术对综掘工作面粉尘运移规律的影响，重点研究总风量恒定条件下径向风量对系统除尘性能的优化机制。研究结果表明：增加径向控风装置后，巷道内粉尘控制效果显著提升；径向控风装置风量为200 m³/min时系统除尘性能最优；现场测试显示，开启优化后的干式过滤除尘系统，掘进机司机位置、距离工作面10 m处和距离工作面30 m处的总尘除尘效率分别达到97.67%、96.88%和96.26%，呼尘除尘效率分别达到95.99%、93.71%和98.62%。进一步验证了径向控风技术的有效性与工程适用性。

A single dust collector is difficult to effectively solve the problem of dust pollution in high air volume excavation face. To overcome this limitation, a radial airflow control technology was proposed and integrated with the dry filtration system. Numerical simulations were conducted to analyze the influence of this technology on dust transport patterns in tunneling faces, with a particular focus on the optimization mechanism of radial airflow under a constant total airflow. The results showed that the addition of the radial airflow control device significantly enhanced dust suppression in the roadway.When the radial airflow volume was set to 200 m³/min, the system achieved optimal dust removal performance. Field tests further demonstrated that, after activating the optimized dry filtration system,the total dust removal efficiencies at the roadheader operator position, 10 m from the tunneling face,and 30 m from the tunneling face reached 97.67%, 96.88%, and 96.26%, respectively, while the respirable dust removal efficiencies reached 95.99%, 93.71%, and 98.62%, respectively. These findings further validate the effectiveness and engineering applicability of the radial airflow control technology.