Abstract: The process of open-pit mining generates a large amount of dust,which is characterized by fast diffusion,high concentration and transient nature,endangering the health of site workers and causing pollution to the environment. In recent years,scholars have conducted more research on blasting dust movement law and dust reduction technology,but the specific blasting dust reduction effect data testing is tedious,and the accuracy is not enough,which leads to a more perfect quantitative evaluation system for the effect of blasting dust reduction in open-pit mines has not been formed yet. To address this problem, the relationship between image grayscale values and dust concentration is analyzed based on the characteristics of the open-pit mine environment,and combined with the rule that blasting dust in open-pit mines is mainly concentrated in the dust clusters formed after blasting,a quantitative analysis software of blasting dust reduction effect based on Matlab software is designed and developed by using image analysis means. The software can calculate the dust reduction efficiency of dust reduction blasting, show the spatial distribution of dust concentration based on the given blasting dust image information,and conduct field application studies with an open-pit mine of Anhui Conch Group as the study example. The results show that the error of the software on the calculation of dust reduction efficiency is lower than 8%,and the operation process is convenient to meet the actual testing requirements. The software can quantitatively analyze the blasting dust reduction effect,and provide reliable reference for the evaluation and optimization of the effects of blasting dust reduction operations.

Key words: mine blasting,open-pit mine,image processing,dust control,quantifying the effect of dust reduction,Matlab