Falloff Angle of Wet spraying Machinery Nozzle and Shotcrete Quality Control

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Su, Chang^1,2 ; Cheng, Yunhai^1,2

School of Energy and Security, Anhui University of Science and Technology, Huainan

232001, China^1

MOE Key Laboratory of Coalmine Safety and High Efficiency Mining, Huainan

232001, China^2

关键词: Construction process;    Experimental research;    Health and safety;    Material Flow;    Nozzle angle;    Numerical calculation;    Outlet velocities;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/3/032158/pdf
DOI  :  10.1088/1755-1315/170/3/032158

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

During the construction process, a lot of dust in wet spraying machinery threats the health and safety of workers. This paper combines numerical calculation with experimental research to investigate the effect of the nozzle angle on the performance of the wet spraying machinery. The results show that when the falloff angle of the convergent section is less than 3°, the falloff angle has little effect on the spray of the concrete mass. However, with the increase of the falloff angle, the spraying velocity of material flow decreases and wear of the nozzle increases; when the convergent section falloff angle is greater than 6°, the outlet velocity of concrete is very small and the nozzle is easily blocked. When the falloff angle of convergent section is between 3°-6°, the nozzle has a better performance.