冻土爆破合理炮孔密集系数的试验研究

Experimental Study on the Coefficient of Hole-spacing in Frozensoil Blasting

炮孔密集系数是影响爆破效果的主要爆破参数之一。初步的理论分析和模型试验结果表明：冻土群药包微差爆破时，较合理的炮孔密集系数取值为m=1．5～2．5。对于断面较小、夹制作用较大的立井冻结表土段爆破，其炮孔密集系数则应控制在m=1．5～2．0较为适宜。

Coefficient of hole—spacing is oned main paramaters influencing blasting effect.The result of theoretical analysis and model experiment shows that reasonable coefficientof hole—spacing is m＝1．5～2．5 in frozensoil—millisecond delay blasting. But morereasonable coefficient of hole—spacing is m＝1．2～2．0 in shaft frozensoil blasting.