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为了寻求合理的爆破参数,改善爆破质量,提高采装效率,鞍钢大孤山铁矿和鞍钢矿山研究所组成三结合试验小组,从1973年4月开始进行挤压爆破试验。试验小组从4～6月共进行6次试验(其中扩大孔距试验一次),共计398个深孔,爆破量104万吨。其中:矿石183个孔,爆破量29万吨;岩石孔215个,爆破量75万吨。
In order to seek reasonable blasting parameters, improve the blasting quality and improve the loading efficiency, the Dagushan Iron Mine and Ansteel Mine Research Institute of Anshan Iron and Steel Group formed a three-in-one combination of experimental groups and started the extrusion blasting test from April 1973. The test team conducted a total of 6 tests from April to June (among which the hole spacing test was expanded once), with a total of 398 deep holes and the blasting volume was 1.04 million tons. Of which: 183 holes in ore, the blasting volume of 290,000 tons; 215 rock holes, blasting volume 750,000 tons.