前言在井下为改善工作环境和确保安全,通风设备的重要性,已为众所周知勿需再加论述。关于局部扇风机,由于其容量小虽在最需要搞好通风的掘进迎头和采煤工作面,也往往被人们所忽视,难以形成良好的通风回路。近年随着采煤工作面向深部开采,井下通风系统越来越复杂,一方面要求局扇有更大的送风能力,另一方面,从改善工作环境的意义上,对局扇的噪音,也必需当做一个 Preface The importance of downhole work to improve the working environment and ensure safety and ventilation has not been further discussed. As for the local fan, due to its small capacity, it is often neglected by the people and it is difficult to form a good ventilation loop. In recent years, with coal mining facing deep mining, the underground ventilation system is becoming more and more complex. On the one hand, it is required that the fan be provided with greater air supply capacity. On the other hand, in the sense of improving the working environment, Must be one