In order to improve the problems of over segmentation,noise and" black hole" that are easy existing in image segmentation of blasting rock mass,the double threshold segmentation technology is proposed,and many kinds of experiments on image segmentation of blasting rock mass and manual measurement of small blasting piles are carried out.The experimental results show that the double threshold method compare with the commonly used segmentation methods such as gray threshold method,adaptive threshold method,Otsu method,etc is more effective in image segmentation of blasting rock pile,and it can so...