关键词: 露天矿, 出入沟, 扩帮过渡, 分期境界

Abstract: During the transition of the mining by stages and by divisions in Nanfen open-pit iron mine，aiming at the problems of the slope rolling stone's constraints and haulageway transition，it's very necessary to adjust the elevation and height of cutting the rolling stones platform.The platform of the wall pushback transition is designed to the transitional haulagway，which is verified by the method of making up the digging schedule plan in order to achieve the goal of safety production and smooth and steady wall pushback transition in Nanfen open-pit iron mine.Meanwhile，the short distance highway transportation is formed with the consumption of trucks fuel lowered，the additional operating costs reduced and the economic benefits of the mine enhanced.

Key words: Open-pit mine, Haulageway, Wall pushback transition, Stages boundary