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遵照毛主席关于“开发矿业”的教导,我矿党委和革委会领导广大职工认真贯彻“鞍钢宪法”,积极开展爆破技术革新。特别是无产阶级文化大革命以来,在采用微差爆破技术上又有进展,至今已全面推广使用了多排孔微差挤压爆破。过去,我矿采用单排孔清碴爆破,爆破前电铲清除台阶正面的松散矿岩。为了均衡生产,各台阶上应贮备一定数量的爆破矿岩量,而清碴爆破很难满足要求,因为,这种方法延滞了穿爆周期,增加了爆破频率,使生产中各工序互相牵制;由于不易控制爆堆的抛掷距离和形状,爆破前后须拆铺铁道。据统计,要进行生产恢复工作,电铲停产时间约占全年时间3～5%。为
Following Chairman Mao’s teachings on “mining development”, the coal mine committee and the Revolutionary Committee led the vast numbers of workers and staff to conscientiously implement the “Anshan Iron and Steel Constitution,” and actively carried out blasting technological innovations. Since the Great Proletarian Cultural Revolution in particular, progress has been made in the application of millisecond blasting technology. So far, multi-row hole millisecond crushing blasting has been widely promoted. In the past, I used a single hole row of smooth ballast blasting blasting electric shovel to clear loose ore rock front. In order to balance the production, a certain amount of blasting ore should be stored on each step, while the ballast blasting is difficult to meet the requirements, because this method delays the blasting cycle and increases the frequency of blasting, so that the production processes contain each other; Because it is not easy to control the throwing distance and shape of the blasting pile, the railway must be demolished before and after the blasting. According to statistics, to resume production, electric shovel shutdown time accounts for about 3 ~ 5% of the year. for