摘要
为了减少联络巷数量和节约成本,需要施工回风巷联络用大直径钻孔,分析了600mm多级正扩钻进工艺和800mm牙轮组合钻头多级回拉扩孔钻进工艺的施工方法和存在的问题,研究了大直径钻孔成孔工艺方法回拉扩孔钻进工艺,并研制了800mm拆装式硬质合金钻头。实际应用表明,采用多级回拉扩孔施工工艺,并在扩孔钻头前端配备扶正器,可以有效地解决钻孔偏斜、排渣困难、钻进效率低等问题,效果明显优于联巷铺管工艺,并具有成本低和周期短的优点。
In order to reduce the quantity and cost of connecting gate, large-diameter connecting drill hole for return airway was necessary, the author analyzed the construction method and open questions of multistage positive expanding drilling technolu gy with diameter of 600 mm and multistage back reaming drilling technology with cone combined drill of 800 mm in diameter, and developed a detachable carbide drill with diameter of 800 mm. The practical application showed that multistage back reaming drilling technology with centering guide in the front of reamer bit could solve effectively the problems of borehole deflection, difficult slagging and low drilling efficiency, the effects were much better than connecting pipelaying technology, and the technology also had low cost and short cycle.
出处
《中国煤炭》
北大核心
2017年第10期72-75,114,共5页
China Coal
基金
陕西省自然科学基础研究计划青年项目(2017JQ5070)
关键词
回风巷联络
大直径钻孔
回拉扩孔
拆装式钻头
return airway connecting, larger-diameter drilling, back reaming, detachable bit
作者简介
田宏杰（1987-），男，甘肃庆阳人，助理研究员，硕士研究生，现任职于中煤科工集团西安研究院有限公司，主要从事钻探机具的设计与研发。
