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冶金部承担矿山方面“七五”国家科技攻关项目两项,它包括4个课题,共19个专题。在国家计委和国务院重大办的大力支持下,6个专题有重大突破。它们是: 1.大型露天铁矿陡帮开采新工艺研究,已在南芬矿通过生产性工业试验,形成了四个台阶一组的组合台阶。使南芬矿由原缓帮开采时的剥米比2.7吨/吨,降低到2.45吨/吨。已累计缓剥岩石600万吨,节省剥岩费1500万元。该专题荣获国家“七五”攻关阶段成果奖。 2.大型露天矿控制爆破技术研究,已在南芬矿、水厂铁矿共进行了8次50～75万吨/次规模的大区多排微差爆破。在提高爆破质量,降低炸药单耗,降低大块率,消除根底等方面,均收到了明显效果。使我国大区多排微差爆破技术达到了国际先进水平。
The Ministry of Metallurgy undertakes two national scientific and technological research projects in the “Seventh Five-Year Plan” period of the mine, which includes four topics and 19 topics in total. With the strong support from the State Development Planning Commission and the State Council, six major breakthroughs have been made. They are: 1. Research on the new technology of steep gangue mining in large open-pit iron mines. Through the productive industrial tests at Nanfen Mine, a combination of four steps has been formed. So that Nanfen mine from the original slow to help when the extraction of stripping rice than 2.7 tons / ton, down to 2.45 tons / ton. The cumulative total of 6 million tons of rock stripping slow, saving 15 million yuan stripping rock. The topic won the national “Seventh Five-Year” key stage achievement award. 2. Large-scale open-pit controlled blasting technology research, has been in Nanfen Mine, Iron Works, a total of 8 times 50 to 750,000 tons / sub-scale large area of multiple millisecond blasting. In improving the blasting quality, reducing the unit consumption of explosives, reduce the bulk rate, eliminate the root and so on, have received significant results. Make our country many rows of millisecond blasting technology reached the international advanced level.