中文摘要：

为了有效解决掘进巷道中的高粉尘体积分数问题,针对目前应用最广的长压短抽通风方式,采用相似实验的方法搭建实验模型装置,研究了长压短抽式通风中的关键参数——压抽比。研究结果表明：在低瓦斯体积分数巷道中,压抽比过小或过大都不利于粉尘的抽排,而在压抽比为1.1~1.3时,巷道前端会形成涡旋风流,减弱了粉尘扩散和沉降作用,并将粉尘有效控制在抽吸作用范围内,最大程度地被吸风风流带走。该结论在现场应用后,取得了良好效果,对长压短抽通风系统的布置具有一定的参考价值。

英文摘要：

In order to solve the problem of high dust concentration in excavation roadways,this thesis focuses on the widely used far-pressing-near-absorption（FPNA） ventilation system,studies the ratio of pressing air volume to absorption air volume in the way of simulation experiment.The ratio is recommended as between 1.1 and 1.3,with which the ventilation system can weaken dust diffusion and sedimentation,and limit the dust within the range of absorption.And the field application with the conclusion proves to be successful,which can provide a guidance and reference for applying FPNA ventilation system.