湘河大泉钒矿复杂地层钻进技术

Drilling Technology in Complex Formation of Xianghedaquan Vanadium Deposit

摘要:

湘河大泉钒矿钻探施工中所遇到的主要问题是第四系黄土层及坡积砾石、细砂岩风化层较厚，上部破碎，钻孔坍塌、掉块严重，下部矿层呈粉状粘土岩，取心难度十分大，成孔困难，导致勘探工程进展缓慢。经过现场及时分析原因，采取有针对性的钻探工艺及其他技术措施，有效地解决了这些问题。

Abstract:

A series of difficulties were encountered for drilling in Xianghedaquan vanadium deposit: quaternary loess & diluvium gravel, thick weathered layer of fine sand rock; broken upper part with borehole collapsing and block falling; powder clay rock for lower ore bed, hard for coring and boring. These difficulties were effectively overcome by pertinent drilling technology and technical measures.