Drilling Technology in Complex Formation of Xianghedaquan Vanadium Deposit

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.