3000m scientific deep drilling construction technology for Jiajika lithium mine in western Sichuan
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摘要: 川西甲基卡锂矿3000 m科学深钻位于青藏高原中北部的松潘甘孜造山带,采用绳索取心钻进和绳索取心液动冲击回转钻进、硬岩地层金刚石钻头优选、加长型内涂层内管和改进型打捞器、环保型无固相聚合物冲洗液技术等关键技术,终孔孔深3211.21 m,创造了高原地区小口径固体矿产勘查孔深新纪录和当时全国同类型钻孔施工效率纪录。对甲基卡伟晶岩锂矿成矿模式、成矿机制的理论创新,具有重要的科学意义,也为高原地区深部钻探施工提供了借鉴。Abstract: The 3000m deep scientific drilling of west Sichuan Jiajika lithium mine is located in the Songpan-Garze orogenic belt in the middle and north of the Qinghai-Tibet Plateau. Key technology such as wireline coring drilling and wireline coring hydraulic percussive rotary drilling, diamond bit optimization in hard rock formation, lengthened internal coating inner pipe and improved fishing device, and environment-friendly solid-free polymer flushing fluid technology are adopted. The final hole depth is 3211.21 meters, creating a new record for the depth of small caliber solid mineral exploration holes in plateau areas and a national record for the efficiency of drilling construction of the same type at that time. It has important scientific significance for the theoretical innovation of the metallogenic model and mechanism of the Jiajika pegmatite lithium deposit, and also provides a reference for the deep drilling construction in the plateau area.
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