若尔盖铀矿田金刚石钻头的研究与应用

Research and Application of Diamond Bits in Zoige Uranium Ore

摘要:

若尔盖铀矿区是全国地质找矿“358”重点整装勘查区，是我国硬岩型保有储量最大的铀资源大基地。该地区处于高海拔地区，生态环境脆弱，可施工的周期短，地层构造发育，换层频繁，造斜能力强，裂隙发育，岩石脆、碎，造成钻头磨损严重、偏磨、钻进时效低、寿命短等问题。针对该地层特点，在前期试验和岩石性质测试分析的基础上，研制了不同结构的金刚石钻头，并在5个孔位中进行了生产试验。试验证明，过改进后的金刚石钻头在钻进时效与平均寿命方面均有显著提高，与2014年度的钻进数据相比，2015年度钻头的平均钻进时效提升了33.7%，钻头平均寿命提高了132%，达到了试验的预期目标

Abstract:

As the largest hard rock type of recoverable uranium deposits base in China, Zoige uranium ore is the key ready exploration area for “358”goal in national geological prospecting. But it is in high altitude area with fragile ecological environment, strata structure development, short construction season, frequent layer changes, strong deviating force, fissures development and brittle and broken rocks, which cause a series of problems of serious bit wear or eccentric wear, low drilling efficiency and short bit service life. According to the characteristics of the formation and based on the preliminary test and the analysis on rock property, diamond bits of different structures are developed and are tested in 5 drilling holes. The tests show that the improved diamond bits have significant increase in drilling efficiency and average bit service life. Compared with the drilling data of 2014, the average drilling efficiency and bit service life are increased by 33.7% and 132% in 2015 respectively; the expected target of experiment is reached.