Abstract: With the advantages of simple operation,low cost and high dust removal efficiency,spray has become one of the most widely used dust-reduction technologies in underground mines. However,traditional spray technology generally has the problems of large spray particle size and low removal efficiency for respiratory dust. For the above problems,scholars have carried out extensive research on the spray dust-reduction technology in recent 20 years. However,the research and application status of this technology are rarely reviewed. Based on this situation,according to the relevant literature in recent 20 years,the research status of the mechanism of spray atomization,evaluation parameters and test methods of spray atomization effect,influencing factors of spray atomization effect,and spray dust efficiency and its influene law are summarized. The results showed that:① the evaluation parameters of spray atomization performance mainly include spray particle size,spray speed,and spray range;② Spray atomization performance is closely related to nozzle structure,air and water pressure,physical characteristics of liquid,etc. ;③ The smaller the spray droplet particle size,the faster the droplet speed,the higher the adsorption efficiency of droplet on dust. According to the research status,the current deficiencies are analyzed,and the main research directions for the future are proposed. That is,further explore the mechanism of spray atomization,improve the evaluation parameters of spray atomization performance,standardize the measurement method of spray dust removal efficiency,and pay attention to the impact of spray additives on the workers′ health and working environment.

Key words: mine dust,spray dust removal technology,atomization mechanism,atomization effect,dust removal efficiency