宽叶螺旋钻中风压钻进技术在晋城某矿的应用

Application of Wide Blade Auger Drill with Medium Air Pressure in Jincheng Coalmine

摘要:

针对晋城某矿井下沿煤层瓦斯抽采钻孔在施工过程中遇到煤层含水量较大时，孔内返风不畅，排粉效果差，影响钻孔孔深和成孔率等问题，采用宽叶片螺旋钻杆中风压钻进工艺及试验。现场试验证明该工艺在含水量较大的煤层沿煤层瓦斯抽采(放)孔钻进施工中较为理想，值得推广。

Abstract:

Great water content in coal seam was encountered in the construction of gas extraction drilling in Jincheng, aiming to the problems of bad in-hole ventilation, poor powder exhaust effect and the affection to borehole depth and hole completing rate, wide blade auger drilling technology with medium air pressure was adopted. The field test proves that this technology application is ideal in such construction conditions.