钻孔风力排渣最小风速及压力损失研究

Study on Lowest Wind Speed and Pressure Loss of Drilling Dust Extraction with Wind - force for Borehole

在顺层长钻孔的打钻工艺中,风力排渣是比较理想的排渣方式。通过实验方法和引用两相流理论分别确定出了最小排渣风速和风力排渣的压力损失,为顺层长钻孔的顺利施工提供了帮助,并在祁南煤矿取得了很好的应用效果。

Drilling dust extraction with wind - force is an ideal way when drilling long borehole down the seam Through experimental methods and theory of two- phase flow, the lowest wind speed of drilling dust extraction with wind - force and pressure loss are determined. According to them, it is successfully when drilling long borehole down seam, and achieving good results in Qinan Coal Mine.