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露天台阶开采 surface bench mining
露天阶梯看台 terrace
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常规的露天台阶爆破可视为两个自由面条件下的爆破。
Typical pit bench blasting can be viewed as blasting under the condition of two free faces.
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根据九架炉采区具体地质条件，进行露天台阶深孔爆破的实践探索。
According to specific geological conditions of Jiujialu mine area, deep-hole blasting open-air stage is explored in this paper.
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