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70年代后期,由于对爆破地震效应的认识有所提高和研究绪果表明美国生产的各种电雷管误差相当大,因而采石工业需要更精确的毫秒延发电雷管。美国矿山局的研究证明:就采石场爆破的震动频率而言,毫秒延发爆破对爆轰波破坏潜能有很大影响。因此,马廷·马里埃塔联合公司制订了控制采石场爆破震动频率的研究计划。1984年该公司与一家大型炸药厂着手执行这项计划以试验一种新型超精密毫秒延发电雷管。在采石场进行了爆破试验,并研究了高精度电雷管用于采石场爆破对爆破地震效应、破碎质量和边坡的影响。为评价采石场爆破效果,使用了包括高速摄影机和爆破地震仪在内的观
In the late 1970s, the quarry industry needed more accurate millisecond delay detonators due to increased awareness of the seismic effects of explosions and the results of the research showing that there was considerable error in the various electric detonators produced in the United States. Research by the US Bureau of Mines has shown that in the case of quarry blasting vibration frequencies, millisecond delay blasting has a significant impact on the detonation wave damage potential. As a result, Martine Marietta developed a research program to control the blasting frequency of quarries. In 1984, the company and a large explosives plant embarked on a program to test a new ultra-precision millisecond delay detonator. The blasting test was carried out in the quarry and the effect of high precision electric detonator blasting on blasting seismic effect, crushing quality and slope was studied. In order to evaluate the quarry blasting effect, the concept including high-speed camera and blasting seismograph