冻土光面爆破参数模型试验研究

Experimental Study on Paramenters of Frozen Soil Smooth Blasting

以冻结砂土为原型进行冻土光面爆破参数的模型试验研究．结果表明，冻土中实施光面爆破是可行的；当炮孔直径３５～５０ｍｍ时，较为合理的光面爆破参数为：炮孔间距５００～７００ｍｍ，装药密集系数０．８～１．２；较为合理的光面爆破装药结构为径向空气间隙和轴向空气垫层不偶合装药．

Model experiments on paramenters of frozen soil smooth blasting are conducted. The effect of model experiments shows that smooth blasting technology may be used in frozen soil blasting and that for hole diameter of 35～50 mm, more reasonable smooth blasting paramenters are coefficient of hole-spasing m=0.8～1.2 and hole interval E=500～700 mm,and more reasonable charge structure is air decoupling and air cushion charge.