前言：利用构造控矿原理，采用坑钻相结合的方式，探明新增地质储量，延长矿山服务年限。
Using the principle of "ore deposit is controlled by structure" and through combining of trench with hole, the new geological reserves of ore are detected that prolongs the service life of mine.
南芬铁矿目前正在进行的三期境界开采的服务年限已经不长了，矿山需要马上着手进行下期深部开采设计。
It will be a short time for Nanfen open-pit iron mine to mine in the third stage. The mine should be engaged on deep part mining design at once.
南芬铁矿目前正在进行的三期境界开采的服务年限已经不长了，矿山需要马上着手进行下期深部开采设计。
It will be a short time for Nanfen open-pit iron mine to mine in the third stage. The mine should be engaged on deep part mining design at once.
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