提高爆破效果、减小爆破地震有两个重要因素:一是使用高精度的毫秒延期雷管;二是选择合适的微差起爆时间。为此,美国许多炸药生产厂家(如Atlas Powder, Austin Powder, Ensign Bickford和Dupont)目前正在生产高精度毫秒延期雷管并设法在生产现场推广使用。一种新系列高精度毫秒延期电雷管已投入使用,该系列分为20段,每段微 There are two important factors to improve the blasting effect and reduce the blasting earthquake: one is to use high-precision millisecond delay detonator; the other is to select the appropriate time of differential detonation. To this end, many U.S. explosives manufacturers such as Atlas Powder, Austin Powder, Ensign Bickford and Dupont are currently producing high-precision millisecond detonators and are trying to promote them at production sites. A new series of high-precision millisecond delay detonator has been put into use, the series is divided into 20 segments, each segment of micro