Based on the two phase flow principle, the pneumatic slagoff for boreholes in coal seams was theoretically researched and simulated.

• 摘要基于两相流的有关原理对煤层钻孔风力排渣进行了研究，结合现场情况，建立了煤层钻孔风力排渣实验装置，对风力排渣进行模拟实验。