分析了管道气力输送混凝土的流动状态,对稀薄流浮游输送作了理论分析以及技术的采用途径。并对混凝土在岩体上的喷敷机理进行了分析,提出最佳射流速度的概念。 The flow state of the pneumatic conveying concrete in the pipeline was analyzed, and theoretical analysis of the floating flow transportation in the thin flow and the adoption of the technology were carried out. The mechanism of concrete spraying on rock mass was analyzed and the concept of optimal jet velocity was proposed.