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掘进工作面压入式通风实际上是有限空间受限贴附射流通风。风流从圆形风筒射入掘进工作面空间形成射流区和回流区。根据流体射流理论，分析了压入式受限贴附射流通风射流产生过程及射流通风风流结构特征．由于受到巷道有限空间的限制，射流流场不能像自由贴附射流那样发展，形成了圆形贴附射流自由段、有限扩张段和收缩段。射流各段的长度与射流受限程度成反比。文中给出了射流各段长度及射流区和回流区断面平均流速和流量的计算模型。
Driving face press-in ventilation is actually limited space limited affixed jet ventilation. Merry wind from the circular duct into the tunnel face space to form jet and reflow zone. According to the theory of fluid jet, the generation process of jets of jets with impingement confined pressure and the structural characteristics of jet ventilation are analyzed. Due to the limited space of the roadway, the jet flow field can not develop like the freely affixed jet, which forms the circular free jet, the limited expansion and the contraction. The length of each section of the jet is inversely proportional to the degree of confinement of the jet. In this paper, the calculation models of the length of each jet and the average flow velocity and flow rate in the jet zone and the recirculation zone are given.