绳索取心钻进在水利水电勘探中存在的问题及解决思路

钻探是水利水电工程勘探中获取地下信息最直接、最重要的手段,钻探质量对水利工程的投资和安全具有极其重大的影响。绳索取心是提高钻探质量十分重要的技术,在国土资源、冶金、煤炭等部门得到了广泛的应用。但是将该技术应用于水利水电工程勘探还存在压水试验、绳索取心钻具不匹配、冲洗液限制等问题。通过对上述问题的分析和研究,提出了解决思路和方法,且在工程实践中取得了良好的效果。特别是研究设计的不提大钻压水试验方法,将压水试验和绳索取心钻进有机地结合在一起,很好地解决了绳索取心钻进难以适应水利水电勘探的关键技术难题。

The Problems and Solving Thoughts of Wire-line Coring Drilling in Water Conservancy and Hydropower Exploration

Drilling is a direct and important method of gaining the underground information in the water resources and hydropower engineering exploration, and the quality of drilling is very important for the water resources engineering's investment and safety. The wire-line coring drilling is a key technology in improving drilling quality, which is widely used in land resources, metallurgy and coal. But there are some problems in water pressure test, unsuitable specification of wire-line coring drilling tools and the flushing fluid limitation. By the analysis and study on the above problems, the solution was put forward and good effects were received. By the designed method of water pressure test with no-hoisting drill, the combination of water pressure test and wire-line coring drilling solved the technical difficulties in wire-line coring drilling to adapt water conservancy and hydropower exploration.