Abstract: In order to realize the digital fine blasting in the explosive operations of open pit,the establishment of an expert system of blast charge and lithologic identification of borehole is the problem urgently to be solved. Based on LWD200 full hydraulic drilling rig,the present study used its self-learning function in site to collect various indexes during drilling in different strata. Using the modern mathematical method to analyze the large amounts of lithologic identification data obtained in site,the relation between the indexes and lithology with certain confidence level was established. Then the state of self-learning function is switched to the state of automatic lithologic identification to gather the data of lithology and location in real time during the drilling process. Finally,the above data was transmitted remotely to the digital blasting design platform to realize the digital fine blasting