Abstract: Since the 21st century,with the progress and development of drilling equipment and blasting equipment,scale of open-pit blasting mining is expanding,and the open-pit deep hole bench blasting technology enters a new stage of refinement.In recent years,open-pit deep-hole bench blasting technology make great technological breakthroughs and create remarkable social and economic benefits.Based on the concept of precise blasting,the research progress of intelligent blasting design,open-pit drilling equipment,digital electronic detonator,field mixed explosive,charge structure and initiation network in the field of open-pit deep-hole bench blasting are summarized and described.The study results show that:① There are many types of intelligent blasting design systems and the progress is obvious.It is necessary to increase the promotion efforts in combination with the production practice to truly achieve the goal of auxiliary engineering design.② The manufacturing capacity of open-pit drilling equipment in China lags behind that of the developed countries in the world.It is necessary to develop the specifications and performance of the equipment and improve the level of automation and intelligence.③ Digital electronic detonators and field mixed explosives enhance the intrinsic safety of blasting equipment,not only improve the safety of blasting equipment,but also help to improve rock breaking effect and reduce blasting vibration.④ The charge structure and initiation network are important embodiments of precision blasting technology,but the relevant basic theories are not perfect.It is necessary to strengthen the interdisciplinary integration,and ultimately achieve the accurate release of explosive energy and improve the energy utilization rate.The development status and main problems of open-pit deep-hole bench blasting technology are analyzed,and the research and development direction of this technology is discussed.

Key words: deep-hole bench blasting in open-pit mine,precision blasting,development status,research prospect