广西向阳坪铀矿床钻探施工技术及改进措施

Drilling technology and improvement measures for the Xiangyangping uranium deposit in Guangxi

摘要:

广西向阳坪铀矿床岩性以花岗岩为主，研磨性强，部分地层复杂，构造裂隙密集发育，岩石破碎，绿泥石化、高岭土化强烈，钻探施工困难。通过采用金刚石绳索取心钻探技术和施工工艺，并针对钻进中遇到的问题，引进了便携式全液压钻机，采用了成膜防塌无固相冲洗液体系及延迟交联凝胶堵漏工艺，优选了环齿式孕镶金刚石钻头，并采取了严格的预防和控制防斜措施，解决了钻进效率低、孔壁不稳定、金刚石钻头寿命短及钻孔弯曲等一系列问题。生产实践证明，该施工技术和工艺具有钻进效率高、岩（矿）心采取率高、劳动强度低等优点，可为花岗岩及复杂岩层钻进施工提供借鉴。

Abstract:

The lithology of the Xiangyangping uranium deposit in Guangxi is mainly granite with strong abrasiveness， and some formation is complex with densely developed structural fissures， broken rocks， strong chloritization and kaolinization， leading to drilling difficulty. With the use of diamond wire line core drilling technology and process， continuous improvement measures have been taken to solve the problems encountered in drilling， such as low drilling efficiency， unstable hole wall， short service life of the diamond bit and bending of the drilling hole. Field practice has proved that the drilling technology and process has the advantages of high drilling efficiency， high core recovery and low labor intensity， which can accumulate valuable experience for drilling of granite and complex strata.