高效机械化湿喷混凝土技术及其在地下矿山的应用

High-Efficient Wet Shotcreting Technology and Its Application in Underground Mines

介绍了湿喷混凝土的特点及作用机理,阐述了水泥、砂石料、硅粉、速凝剂、减水剂等各湿喷混凝土物料组分的特点、掺量、对湿喷混凝土可泵性和力学性能的影响,以及外加剂在国内外的应用现状和未来发展趋势等,分析了湿喷机和带机械手及行走系统湿喷车的各自优势、适用范围和湿喷工艺,介绍了锦丰金矿湿喷混凝土的最优配合比和湿喷工艺,并与干喷混凝土进行了技术经济对比分析。

The paper presents the characteristics and mechanism of wet shotcrete, the effect of the characteristics and amount of the wet shotcrete components such as cement, aggregate, silica powder, accelerator and water reducer on the pumpability and mechanical properties of wet shoterete, and the additive application state and perspective at home and abroad. It also analyzes the respective advantages, application scope and technical process of a wet shotcreting unit and a wet shotereting vehicle with robot and walking system, and describes the optimal proportioning of the wet shotcrete and wet shotcreting process used at Jinfeng Gold Mine, which is compared with dry shotcrete in terms of technology and economy.