我工区广大革命职工遵照毛主席“开发矿业”的伟大教导,大打矿山之仗,高举鞍钢宪法的光辉旗帜,大搞技术革新,于一九七○年六月试验成功了用深孔一次爆破法掘进天井新工艺.到一九七二年八月已先后爆通了24条天井,总进尺620米(见表).两年多来的实践使我们对这一新工艺的认识逐步加深,初步摸索到一些规律. In line with the great teaching of Chairman Mao’s “mining development,” the vast majority of revolutionary workers in our work area staged fierce battles in mines, held the glorious banner of the Ansteel constitution, conducted major technological innovations and succeeded in using one deep-hole blasting in June 1970 Law excavation of the new process of the Patio .Twenty-four patios had been exploded by August 1972 with a total footage of 620 meters (see table) .After more than two years of practice, our understanding of this new technology has been gradually deepened, Preliminary exploration of some laws.