基于国内外煤矿喷射混凝土支护技术现状,研发了煤矿井下湿式混凝土喷射机组以及成套工艺。阐述了其设计方案、工作原理和应用情况,并与干式混凝土喷射技术进行了对比分析。实践证明,湿式喷射机组的使用,能很好地降低煤矿井下喷射混凝土时的粉尘浓度和回弹量。 Based on the current status of coal mine shotcrete support technology both at home and abroad, a wet concrete injection unit in coal mine and a complete set of process have been developed. The design scheme, working principle and application are expounded, and compared with the dry concrete jetting technology. Practice has proved that the use of wet jet unit, can well reduce the dust concentration and rebound when the coal mine shotcrete.