炸药单耗对台阶抛掷爆破效果的影响研究

发布时间：2018-12-16 17:11

【摘要】：为研究炸药单耗的改变对台阶爆破抛掷效果的影响,以相似理论为基础,利用量纲分析法推导出了台阶模型试验应遵循的相似准则,在试验场采用一定配比的水泥砂浆制作了5个单排孔台阶模型,统计了爆破后的最远抛掷距离和有效抛掷率.模型试验结果表明:爆堆前部碎块主要来源于台阶模型中层,最远抛掷距离和有效抛掷率随炸药单耗的增加而增大,但增大的趋势逐渐变缓;当q0.51kg/m~3时,有效抛掷率可以达到40%以上;当0.51kg/m~3q0.63kg/m~3时,抛掷率随单耗增大而增加,且增加幅度明显;当q0.63kg/m~3时,抛掷率随单耗增大而增加的速率变小.
[Abstract]:In order to study the effect of the change of explosive unit consumption on the throwing effect of bench blasting, based on the similarity theory, the similarity criterion of step model test is deduced by using the dimensional analysis method. Five single-row hole step models were made in the test site with cement mortar of certain proportion. The furthest throwing distance and effective throwing rate after blasting were calculated. The results of model test show that the fragments in the front part of the explosive pile mainly originate from the middle layer of the step model. The farthest throwing distance and the effective throwing rate increase with the increase of explosive unit consumption, but the increasing trend gradually slows down. When q0.51kg / m3, the effective throwing rate can reach more than 40%, and when 0.51kg / mc3q0.63kg / m3, the throwing rate increases with the increase of unit consumption, and the increase range is obvious. When Q was 0.63 kg / m ~ 3, the rate of throwing increased with the increase of unit consumption.
【作者单位】：昆明理工大学国土资源工程学院;北京理工大学爆炸科学与技术国家重点实验室;
【基金】：国家自然科学基金资助项目(51304087,51564027,41362013) 爆炸科学与技术国家重点实验室(北京理工大学)开放基金资助项目(KFJJ15-14M)
【分类号】：TD235

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