Abstract: In view of existing problems of the high rebound rate and dust concentration in the process of shotcrete of a bauxite mine of Guizhou Province,based on total quality control (TQC) theory,through the PDCA quality control procedures,the present situation of rebound rate and dust concentration of shotcrete of the mine is investigated,the influence factors of high rebound rate and dust concentration of shotcrete are discussed,the main reasons of high rebound rate of shotcrete are determined by causality analysis correlation method,by formulating management measures, improving the proportion of shotcrete supporting materials and optimizing the allocation of shotcrete equipment,meanwhile,the working method and process parameters of shotcrete supporting are improved.The field test verification results show that the problem of high rebound rate and dust concentration of shotcrete of the mine are solved effectively,besides that,the reduction methods of high rebound rate of shotcrete and dust concentration can provide proposed in this paper can provide reliable reference for the other mines.

Key words: Bauxite mine, TQC,Shotecrete support, Rebound Rate, Dust concentration