露天挂帮矿及境界以下矿石开采方法研究

根据马钢南山铁矿凹山采场边坡挂帮矿及露天底以下赋存矿石的特征和储量，提出采用扩大境界开采方法：西北帮挂帮矿实施扩大境界开采，回收境界外矿石；露底以下矿石采用延伸开采最低水平，以回收底部矿石，使境界外矿石尽可能多地回收延续南山矿凹山采场开采年限。

Study on the Mining Method for the Hanging Wall Ore and that Under the Open-pit Bottom

In view of the characteristics and reserve of the hangingwall ore of Washan pit's slope and that under the open-pit bottom at Nanshan Iron Mine,Maanshan Steel,boundary-enlarging mining method is recommended.Boundary-enlarging method can be used for mining the hangingwall ore of north-west slope to recover the ore outside the boundary while the lowset level extension method can be used for the ore under the open-pit bottom to recover the bottom ore.In this way the ore outside the boundary can be recovered as many as possible so as to prolong the life of Nanshan Iron Mine's Washan pit.