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在毛主席无产阶级革命路线指引下,承钢大庙铁矿从1967年开始进行无底柱分段崩落采矿法的试验,至1970年初步试验成功并逐步转入生产。几年来,由于狠抓了革命,以革命统帅生产,坚持采用无底柱分段崩落采矿方法,矿山连续三年接近和超过设计能力,保有的三级矿量达到了国家标准。按设计定员,人员减少39%,实现了稳产、高产。1971年在24~#矿体采用无底柱分段崩落采矿法,生产了24万吨铁矿石,只需63人;而26~#矿体采用小中段采矿法,生产27万吨铁矿
Guided by Chairman Mao’s proletarian revolutionary line, the Chengguan Iron Temple in Dangang conducted a test of the subsea pillar caving mining method from 1967 to 1970, and successfully started the trial and gradually turned it into production. Over the past few years, due to pay close attention to the revolution, the revolutionary commander of the production, insist on using subsea pumped caving method, the mine for nearly three years and close to the design capacity, retained three ore reached the national standard. By design capacity, staff decreased by 39%, to achieve a stable yield, high yield. In 1971, the pillarless caving mining method was applied to No.24 ore body, producing 240,000 tons of iron ore, only 63 people; and the 26 ~ # ore body adopts small and medium-sized mining method to produce 270,000 tons of iron ore