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冶金部安全环保司于1989年12月22日至23日在湖北大冶主持召开了孔底起爆安全装置技术鉴定会。大冶铁矿尖林山车间采用无底柱分段崩落法开采,长期存在爆破后进路眉线破坏严重,爆破效果不佳,二次破碎炸药单耗大,并加剧产生悬顶等问题。为了解决这些问题,冶金部安全环保研究院、大冶铁矿和大冶化工厂联合研究孔底起爆安全技术问题。在分析孔底起爆潜在
Ministry of Metallurgical Safety and Environmental Protection Division in December 22, 1989 to 23 in Hubei Daye presided over the hole bottom explosion safety device technical appraisal meeting. The Shaoyilin Mountain workshop in Daye Iron Mine was mined by the subsidence-free method with a bottomless pillar. After the long-term existence of the blasting, the brow line was severely damaged, the blasting effect was poor, the unit consumption of the secondary crushing explosive was large, and problems such as suspended roof were aggravated. In order to solve these problems, the Ministry of Metallurgical Safety and Environmental Protection Research Institute, Daye Iron Mine and Daye Chemical Plant jointly study the safety of bottom hole detonation technology. Potential explosion in the analysis of the bottom hole