Analysis of efficient drilling measures for 3000m scientific deep drilling in Jiajika Lithium Mine, western Sichuan
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摘要: 位于海拔4500 m 青藏高原中北部的川西甲基卡锂矿3000 m 科学深钻（JSD 孔）终孔孔深3211.21 m、施工期仅为232 d，创造了青藏高原小口径固体矿产勘查孔深纪录及同类型钻孔全国效率纪录。本文从钻探设备及机具选型、钻探技术优化和施工组织管理等方面，系统分析了JSD 孔的钻探效率提升措施。具体措施总结为，合理选择钻探设备与机具是基础，采用绳索取心液动锤钻进技术、环保冲洗液技术、孔内事故预防等特定钻探技术及方法应用是关键，标准化组织管理是保障。JSD 孔高效钻进措施可为提高青藏高原深孔、特深孔施工钻探效率提供借鉴参考。Abstract: The 3000m scientific deep drilling project (JSD hole) of the west Sichuan Jiajika Lithium Mine is located in the central and northern part of the Qinghai-Tibet Plateau, with a final drilling depth of 3211.21m and the construction period of only 232d, creating a record in the field of small-bore solid mineral exploration on the Qinghai-Tibet Plateau and a national efficiency record of the same type of drilling. This article systematically analyzes the measures to improve the drilling efficiency of JSD hole from the aspects of drilling equipment and tools, drilling technology and methods,construction organization and management. The specific measures are summarized as follows:reasonable selection of drilling equipment and tools is the foundation, specific drilling techniques and methods are the key such as wire-line coring hydraulic hammer drilling technology, environment-friendly flushing fluid technology, hole accident prevention and so on, moveover, the standardized organization and management is the guarantee. The efficient drilling measures of JSD hole can provide reference for improving the drilling efficiency of deep and extra-deep hole construction in the Qinghai-Tibet Plateau.
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