关键词: 复杂地层, 深孔取芯, 钻孔事故, 处理方法

Abstract:

The geology condition along the route of Water Diversion Project in Central Yunnan Province is complicated, in which, Xianglu mountain tunnel is the largest controlling work in the water diversion project with complicated geological genesis and the geology along the route is most broken, so the geological drilling is very difficult, and various accidents are easily to occur. Taking XLZK12 drilling hole as a case, the technologies in the treatment of the accidents encountered in the complex geological stratum are summarized. The adopted measures by common drilling tool and coring drilling tool in dealing with the accidents inside the drilling hole are introduced in detail. 

Key words: complex stratum, deep-hole coring, drilling accident, treatment measures