Abstract: The key factors for good roadway formation are mainly the lithology of the ore rock,the development of the structure,the sequence of blasting holes,the amount of charge in the holes and the distance between the surrounding eyes.At present,the initiation sequence and the amount of charge in the hole in the underground excavation construction of the Dahongshan Iron Mine are both mature technologies.At this stage,the smooth blasting test of the trolley is mainly used to adjust the distance between the peripheral eyes.In order to explore the smooth blasting technology of trolley boring in Dahongshan Iron Mine No.1 copper mine belt,through the comparison of the test results of the trolley boring smooth blasting with different peripheral eye spacings,the periphery of the optimal trolley boring smooth blasting effect was found.The eye spacing lays a solid foundation for vigorously promoting the smooth blasting of the trolley.With the in-depth study and summary of the research,the operation efficiency of the various types of metal mines is improved,the safety risk is reduced,and it will be more widely applications.

Key words: roadway forming,smooth blasting,trolley driving,spacing