Abstract: Trackless new mining technology is introduced for the mining at -460 m in Datuanshan deposit. According to the geological conditions of the deposit and the state quo of the upper mining and to over 40 years' successful mining experience in the old Donggushan copper area, the technology of large-diameter long-hole sublevel open stoping with delayed filling is selected. In light of the gradually increasing one-step extraction ground pressure in the panel, the drilling chamber arrangement is optimized, thus ensuring the establishment of a safe, high efficient and flexible trackless new mining process.

Key words: Datuanshan deposit, Mining technology, Large-diameter long-hole sublevel open stoping with delayed filling