装填密度对乳化粉状炸药燃烧转爆轰敏感性的影响  

Charging Density Effects on DDT Sensitivity of Powdery Emulsion Explosives

作　　者：段宝福[1] 汪旭光[2] 宋锦泉[2] 

机构地区：[1]辽宁工程技术大学爆破所 [2]北京矿冶研究总院,北京100044

出　　处：《有色金属》2003年第4期150-152,共3页Nonferrous Metals

基　　金：国家自然科学基金(50174008)

摘　　要：采用电阻丝加热的点火方式,对不同装填密度的药床进行燃烧转爆轰试验。结果表明,药床装填密度过小或过大时,乳化粉状炸药均不能出现燃烧转爆轰现象。装填密度在0.68～0.89g/cm^3之间的药床,试验中出现了燃烧转爆轰现象,并且爆轰发生时间与装填密度之间呈“U”型曲线,最佳密度区间(0.78～0.84g/cm^3)药床最容易发生DDT现象。热点温度和质量燃耗率分析结果分别解释了爆轰发生时间与装填密度“U”型曲线的左、右两部分。The experiments on Deflagration to Detonation Transition (DDT) of powder emulsion explosives (PEE) beds with different densities are conducted by resistance ignition. The results indicate that while bed density is too low or too high there is no DDT occurred for PEE. The DDT phenomena are appeared in PEE beds with densities between 0.68 and 0.89 g/cm3, and the relationship between detonation time (the time from bed ignition to detonation) and charging densities is in a 'U' type curve. The DDT of PEE occurs most easily in the optimal charging density range within 0.78 - 0.84 g/cm3. The left and right parts of the 'U' type curve result are well expressed by theoretical analyses with heat spot temperature and mass heat yielding and exhausting rate, respectively.

关 键 词：采矿工程 乳化粉状炸药 燃烧转爆轰 敏感性 装填密度 爆轰发生时间 

分 类 号：TD235.212[矿业工程—矿井建设] TQ560.72[化学工程—炸药化工]