深部地质钻探钻孔结构设计与施工分析

Analysis of design and construction of deep geo-drilling boreholes

摘要:

根据长期深部钻探施工经验，分析了深部地质钻探钻孔结构设计的主要依据和原则，通过典型深孔钻孔结构设计与实施的案例，总结了几种钻孔结构实施程序：（1）在地质预测与实际相差不大的熟悉工区，根据经验有针对性地选择钻孔结构进行施工的按设计施工法；（2）在不能预测下部地层复杂情况的条件下，采用探索、扩孔并根据实际调整钻孔结构的探索施工法；（3）利用大口径尽可能向下钻进的充分施工法等。通过实际案例分析，为深孔、超深孔钻探钻孔结构设计与施工提供一定的经验参考。

Abstract:

According to the long-term deep drilling experience, this paper analyzes the main criteria and principle of deep geological drilling design. Through typical cases of deep drilling structure design and implementation, a few drilling structure implementation procedures are summarized. First, for the familiar mine where geological prediction is not far from the reality, drilling can be performed as the experience-based design. Second, if the complex conditions of the lower strata cannot predicted, the exploratory method is adopted, including pilot drilling combined with reaming, adjustment of the drilling structure according to the actual situation. Third, larger diameter drilling should proceed as deep as possible. It may provide some experience reference for the structure design and construction of deep holes and ultra-deep holes.