In order to address problems of high cost,high noise and low efficiency of traditional smooth blasting technology,a new charging structure without a detonating cord was proposed,and the parameters were determined according to the requirements of smooth blasting.Tests on smooth blasting without a detonating cord were carried out for blastholes with non-coupling coefficients of 3.8,3.9 and 4.0,respectively.Based on the analysis of the half-hole rate after smooth blasting,the smooth blasting effects of blastholes corresponding to three non-coupling coefficients were analyzed based on comparison.The results show that each blasthole for smooth blasting can be successfully initiated by using a charging structure without a detonating cord,and the half-hole rates of blastholes are 78.40%,89.60%and 57.60%respectively corresponding to those three non-coupling coefficients.It is concluded that an optimal non-coupling coefficient of this new smooth blasting technology in the test is 3.9.
关键词
边坡开挖/光面爆破/装药结构/爆破参数/无导爆索起爆/不耦合系数/爆破效果/半孔率
Key words
slope excavation/smooth blasting/charging structure/blasting parameters/blasting without a detonating cord/non-coupling coefficient/blasting effect/half-hole rate
维普
万方数据