马坑铁矿隔离层矿柱安全厚度的分析和研究

Analysis and Research on the Safe Thickness of Isolation Layer Pillar in Makeng Iron Mine

为实现大型铁矿床多中段同时安全开采和采矿方法稳妥变革,提出了中段间留设隔离矿柱的措施,采用了经验类比和理论公式计算的2种方法对隔离层安全厚度进行了科学分析和研究,得出合理的安全厚度为15-20 m。后经生产试验验证了两个90m长度的盘区,安全与技术经济指标均取得了较好的效果。

To realize the safe multi-level mining at the same time and the steady transformation of mining method in a large iron deposit,a measure was put forward to arrange the isolation pillar between middle levels.The experience analogy and the theoretical formulae were used to scientifically analyze and study the safe thickness of isolation layer.It obtained that the safe thickness was 15-20 m.Finally,the production tests were conducted in two panels with the length of 90 m,which proved that the measure could obtain good safety,as well as the technical and economic effect.