An experimental test of bench mining in the high and dangerous slope of a certain open-pit mine was made.

在某露天矿山的高危边坡上进行了台阶采矿的试验研究。

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According to the test in Nanfan Open Pit, shows the method is available, the absorbing shock rate of this method reachs 68%, the bursting range of back shock reduces 78%.

通过在南芬露天铁矿的应用，表明该方法是行之有效的，降震率为68%，后冲破裂范围减少78%。

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According to the test in Nanfan Open Pit, shows the method is available, the absorbing shock rate of this method reachs 68%, the bursting range of back shock reduces 78%.

通过在南芬露天铁矿的应用，表明该方法是行之有效的，降震率为68%，后冲破裂范围减少78%。

youdao