How to achieve the improvement and transportation of deep mineral resources has become an urgent issue to be solved in ultra-deep well engineering. Therefore, this paper proposes a main-auxiliary collaborative transportation system for deep ground fluidized mining. Of this, the main transportation system, which is based on the theory of solid-liquid two-phase flow and multi-stage pump technology, adopts an ore slurry pipeline vertical transportation system to transport the fluidized mineral resources to the ground. The auxiliary transportation system, which uses a linear motor and gear-rack composite lifting method, adopts a rope-free lifting system to achieve back-and-forth transportation of personnel, equipment, and materials. Based on this, the paper identifies important fundamental theories and key technical issues that need to be urgently addressed and researched in the construction of deep ground ore slurry pipeline transportation systems and ultra-deep well rope-free lifting systems. To address and research these issues, it developed a vertical ore pulp pipeline test system, reaching a height of up to 43 meters, and a linear motor and gear-rack composite lifting test system. Then, research was conducted on the measures for wear reduction in vertical fluidization pipelines and the control strategy for composite rope-free lifting system. This lays a theoretical and experimental foundation for the breakthrough of rope-free lifting and pipeline transportation technologies, which are urgently required for the development of deep ground resources fluidized mining.

Deep ground mining,Mineral resource,Rope-free lifting,Pipeline transportation,Linear motor,Gear-rack system