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为改善机掘工作面作业环境,提高通风控尘效果,采用旋转射流屏蔽通风技术实现对机掘工作面粉尘的有效控制。利用Fluent计算流体力学(CFD)软件,对该通风方式下不同吹吸流量比情况开展数值模拟,并进行相关试验验证。研究结果表明:就所研究的机掘工作面旋转射流屏蔽通风系统而言,合适的吹吸流量比范围是0.8～1.4,当吹吸流量比为1.0时控尘效果最佳。在工作面实际应用中,通常将吹吸流量比设定在1.2～1.4范围,既能保证掘进巷道有足够的新风量,防止瓦斯超限,又能获得较好的控尘效果。
In order to improve working environment of machine digging face and improve the effect of ventilation and dust control, rotary jet shield ventilation technology is used to effectively control the dust of machine digging working face. Fluent Computational Fluid Dynamics (CFD) software is used to simulate the different blow-suction flow rate under the ventilation mode, and the relevant experimental verification is carried out. The results show that the proper ratio of blowing to blowing flow is 0.8 ~ 1.4 for the rotating jet shielding ventilation system of the working face of machine digging, and the dust control effect is the best when the flow ratio of blowing to suction is 1.0. In the practical application of the face, the blow-flow ratio is usually set in the range of 1.2-1.4, which can ensure that there is enough fresh air volume in the roadway to prevent gas overrun and achieve better dust control effect.