冶金部于1984年5月30日在鞍钢弓长岭铁矿主持召开了岩石爆破性分级鉴定会。参加会议的有38个单位的64名代表。会议期间,代表们听取了东北工学院、弓长岭铁矿代表所作的岩石爆破性分级研究总结、鞍钢弓长岭铁矿岩石爆破性分级试验研究等报告,审阅了有关的技术资料。建国三十多年来,我国的岩石爆破分级一直沿用苏联的普氏分级和苏氏分级,实践证明 Ministry of Metallurgical in May 30, 1984 in Anshan Iron and Steel Bow Changling held blasting classification appraisal will rock. 64 delegates from 38 units attended the meeting. During the meeting, the delegates listened to the reports of blasting grading research done by representatives from Northeast Institute of Technology and Gongchangling Iron Mine and the blasting grading test of the bowchangling iron mine in Anshan Iron and Steel Co., Ltd., and reviewed the relevant technical materials. For more than thirty years after the founding of the People’s Republic of China, the classification of rock blasting in our country has always followed the Platonic classification and the Soviet classification of the Soviet Union. Practice has proved that