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1989年5月13日冶金部矿山司领导在西石门铁矿听取了北京科技大学采矿系、西石门铁矿一年来采矿技术攻关情况的汇报。自去年攻关工作汇报会以后,第一试验采场(403)于1988年7月切割槽爆破出矿,出矿2000多吨(约占协割槽在本采场负担矿量的三分之一)。2号斗在出矿1500余吨后,发现斗颈上部距耙道约8m处有一层悬顶,经爆破处理后又出矿200余吨,才开始第一排束状孔的施工。根据单体试验和模拟试验数据,设计并施工了第一排平行密集束状孔;参照西石门矿中深孔崩矿的炸药单耗计算了束状孔炮孔个数;
On May 13, 1989, the leaders of the mining department of the Ministry of Metallurgy listened to the mining department of Beijing University of Science and Technology and the report of mining technology in Xishimen Iron Mine in Xishimen Iron Mine. Since last year’s work conference on tackling key problems, the first test stope (403) has been blasting out of the trenches in July 1988 and over 2000 tons of ore (accounting for about one-third of the amount of ore mined in this stope ). No. 2 bucket in the mine more than 1,500 tons and found that the upper part of the bucket neck about 8m from the rake about a layer of cantilever, after blasting and mining more than 200 tons of ore, began the first row of beam hole construction. According to the data of single-body test and simulation test, the first row of parallel dense bundles of holes are designed and constructed. The number of holes of beam-shaped holes is calculated with reference to the unit consumption of explosives in deep-hole collapsing in Xishimen Mine.