The essay expatiates the techniques of borehole in surfaceblasting, and instructs the construction of borehole in surfaceblasting.
本文阐述了露天深孔爆破的钻孔施工工艺,对露天爆破钻孔有参考和指导作用。
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One time blasting of deep and medium holes was applied for the cut through raise and smooth surfaceblasting was used for the stope periphery and upper wall to ensure the stope safety.