Abstract: Aiming at situation of large tailings discharge quantity, short of storage capacity, land expropriation is difficult if build new tailing pond in China, technical scheme of open pit change to underground mine and using Mined-out open pit  to discharge tailings was proposed. In the practical situation of Chengde Heishan iron ore, preliminary discussion was done on scheme of 1#excavating plant of Heishan iron ore reconstructed into tailing pond.

Key words: Excavating plant, Ending of the mining, Tailing pond