绳索取芯钻进技术在深埋隧道勘察孔中的应用

Application of rope core drilling in prospecting hole of deep-buried tunnel

绳索取芯钻进技术已普遍应用于深孔钻探施工中,但在水利水电系统工程地质勘探中应用较少。以某深埋隧道工程为例,介绍了绳索取芯钻进技术在深埋隧道勘察孔中的应用,着重对钻进时取芯钻杆内壁"结垢"以及遇泥浆严重漏失时所采取的解决措施和新方法进行了介绍。实践表明,该技术在深埋隧道勘察孔应用效果明显,值得推广。

The rope core drilling has been widely used in deep hole prospecting construction, however its application in geolog- ical prospecting of hydropower engineering is still rare. Taking a deep - buried tunnel as an example, we present the application of rope core drilling technology in prospecting hole of deep - buried tunnel. Especially, the countermeasures and new methods for inner surface scaling of drilling pipe in drilling process and for serious slurry leakage are introduced. The practice shows that these methods obtain satisfying effect in prospecting hole of deep - buried tunnel, and is worth being popularized in geological prospecting of hydropower engineering.