定向长钻孔精确探放矿井老空水技术及其应用

Technology and application of precise detection and drainage of goaf water by directional long borehole

老空水害事故危害程度大。系统研究了定向长钻孔探放老空水的原理、钻进装备、钻孔设计和成孔工艺方法等关键技术,将随钻测量定向钻进与常规回转钻进技术结合施工定向长钻孔,实现了煤矿井下老空水的精确探查和疏放,形成了一套老空水探放技术与装备。在宁煤集团白芨沟煤矿现场应用情况表明,该技术方案先进可靠,老空水探放效果良好。

Goaf water is an important type of mine water disaster, causing serious accident. Use of directional long borehole to detect and drain goaf water is an important innovation for coal floor water prevention. By combining directional drilling technology with conventional rotary drilling technology, this paper systematically studied the detection and drainage of goaf water by directional long borehole, drilling equipment, borehole design, drilling technol-ogy, directional drilling technology and equipment. The tests in Baijigou mine show that the drilling technology and equipment are reliable and advanced, the effect of detection and drainage of goaf water is good. The research results en-rich and improve methods for goaf water prevention, it is significant for safe and highly efficient mining.