江苏冶金厅于1986年5月23日至24日在利国铁矿主持召开了采场控制爆破技术鉴定会。由马鞍山矿山研究院与利国铁矿合作的该项试验研究,将周边控制爆破、大孔距爆破和微差爆破技术综合应用于浅孔留矿法采场的落矿中,在提高采场顶板稳定性的同时,降低了大块率。试验采场自1985年3月至11 Jiangsu Metallurgical Office in May 23, 1986 to 24 in Li Guo iron ore chaired stope blast control technology appraisal meeting. The experimental study by the Ma’anshan Mining Research Institute in cooperation with the Liuguo Iron Mine comprehensively applied the peripheral controlled blasting, large-hole blasting and micro-blasting techniques to the mining of stopes for the shallow-hole retention mining method, The stability of the roof at the same time, reducing the bulk rate. Test stope since March 1985 to 11