在有瓦斯与煤尘爆炸危险的矿井回采工作面和独头巷掘进头,往往使用空气喷射装置。现有空气喷射装置虽具有多种不同结构型式,但就其动作原理而言,却都是以依靠喷咀喷射出压缩空气流的动压力(速度头)而形成进风管与排风管之间压差为基础的。由于压缩空气的动压力在扩散器内部转变为静 In coal mining face with gas and coal dust explosion danger and single-head tunneling head, air-jetting device is often used. The existing air injecting devices have a variety of different types of structures. However, in terms of their operation principle, the air injectors and the exhaust ducts are formed by the dynamic pressure (velocity head) that ejects the compressed air flow by the nozzles Between the pressure-based. As the dynamic pressure of compressed air inside the diffuser into static