Development of cement dust suppression technology during shotcrete in mine of China-A review

The shotcrete has become a major technique in the support construction of underground mine. Unfortunately, enormous amounts of cement dust may be produced during shotcrete because of deficient mixing of materials and high jet speed. At present, in term of dust suppression, the dust generated from shotcrete is easily ignored when compared with the rock or mine dust in mine exploitation. The paper summarizes the development of cement dust suppression technology during shotcrete. The component and pathological damage of cement dust was analysed. The diffusion of shotcrete dust was uncovered as well as alkaline particle distribution. Efforts to control and reduce the shotcrete dust were done, including developing new shotcrete machines, optimizing process and using new material technology and so on. Finally, challenges of shotcrete proposed in special roadway environment of China' mine still exist and further efforts need to be made.