Study on influence of characteristics of air-supply jet on drain contamination efficiency and air quality in heading

• 来源期刊: 煤炭学报（英文版）
• 学科: 工学
• 年，卷（期）: 2001,（2）
• 页码范围: 67-72
• 页数: 6页
• 分类号: TD7
• 语种: 英文

摘要

Based on the theory of air-supply jet, the conception and theory o f the air quality and the drain-contamination efficiency, the results achieved b y comparing the circular cross-section wall jet with the plane wall jet were fo l lowing: firstly, within the limitation of the ventilation distance at the tunnel heading in a coal mine, there were a better air quality and a higher efficiency of drain-contamination with application of the plane wall jet ventilation. Sec o ndly, there was a advantage to improve the air quality of the workers breathin g area with mounting the air-supply outlet on the top but not on the side of the tunnel heading.