岩块孔block hole 炮孔间距spacing；hole spacing；spacing in drilling 炮孔直径 borehole diameter；diameter of blasthole or borehole ..
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岩块孔block hole 炮孔间距spacing；hole spacing；spacing in drilling 炮孔直径 borehole diameter；diameter of blasthole or borehole ..
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岩块孔block hole 炮孔间距spacing；hole spacing；spacing in drilling 炮孔直径 borehole diameter；diameter of blasthole or borehole ..
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扇形炮孔间距 fan burden
从理论上推导了切割时的炮孔间距的计算公式，并得到了试验的证实。
Theoretically, a calculating formula of borehole span in marble cut was produced which was proved in the site tse...
通过大量的预裂爆破试验，得出了适用于该边坡的炮孔直径、炮孔间距、线装药密度、不耦合系数等一系列常规预裂爆破参数。
Pre-splitting blasting experiments were carried out to obtain normal pre-splitting blasting parameters such as hole diameter, hole space, gun- powder charge line density, and uncoupling factor.
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