一、微差爆破微差爆破又称毫秒爆破,是将炮孔分组,以毫秒的时间间隔,进行顺序起爆的爆破方法。远在四十年代初期,美国在露天开采中就已应用。由于它优于瞬发爆破,故在美国、苏联、加拿大、英、法等国已广泛采用。我国从六十年代初期开始微差爆破技术的试验、应用。目前,国内绝大多数露天矿已普遍采用微差爆破,如:大弧山、齐大山、眼前山、南芬、水厂、歪头山、兰尖、南山、吉山、朱家包包、甘井子等 First, the millisecond blasting Millisecond blasting, also known as millisecond blasting, is the blasting hole grouped to millisecond intervals, the order of detonation blasting method. Far from the early 1940s, the United States used it in open pit mining. Because it is superior to instantaneous blasting, it has been widely adopted in the United States, the Soviet Union, Canada, Britain, France and other countries. Experiments and applications of our country from the early 1960s to the millisecond blasting technology. At present, the vast majority of open-pit mines in China have adopted micro-blasting, such as: Daquanshan, Qidashan, An Shan, Nanfen, Waterworks, Waitoushan, Lancun, Nanshan, Jishan, Wait