Abstract: The technical progress of open pit mining in metal mines since the founding of the people's Republic of China are introduced and compared with the advanced level at abroad.It is concluded that such techniques as open-pit steep mining,and high bench mining,wearing explosive technology have been developed rapidly and have a certain technical advantage.They basically follow the international trend,and some of them even approached the international leading level.The open pit transportation system,large-scale equipment and automation have been closed to the international advanced level.Meanwhile,there still exists a large gap in the digital mine,mining monitoring means and modern management,and so on.It is proposed that within a period of time in the future,the opencast mining technology trends to the continuous,concentrated mining process and the equipment are large-scale and intelligent.The extremely deep open-pit mining,wasteless mining technology,digital mine are intended to be explored.

Key words: Steep slope mining, Extra deep open pit mine, Digital mine, Wasteless mining, Continuous transportation