Abstract: Yuanjiacun Iron Open-pit Mine owns the design production capacity of 22 Mt per year.It is hillside stripping open pit at first phase, and subsequently converted to deep open pit.The design service life is 38 a (excluding construction period, 3 a).The mine is put into production at the fourth year, reaches the production capacity at the fifth year with the stable production period of 34 a and the stripping ratio of 2.9 t/t.During the construction period, some difficulties exist in capital construction of the hillside stripping, such as, narrow and small working face, inadequate new level preparation, low equipment efficiency, and the advance preparation of crushing station etc..Meantime, it is also with great significance to shorten the period from the capital construction to the regular production and make the transition of small-sized excavator and large-sized electric shovel smooth and stable.Therefore, this paper focuses on the optimization of the capital construction plan, especially the new level preparation and the transition from capital construction to the stable production.These ensure the capital construction smoothly, and make Yuanjiacun open pit reach the design capacity at the first year of stable production.

Key words: Hillside Open pit, Capital construction period, New level preparation, Stripping engineering optimization