【摘要】 安徽省庐江县龙桥铁矿-320 m水平采空区,发生局部塌落导致现有采空区形态不详,为保证下部矿体正常安全开采,在地表不允许塌落的情况下,采用留设隔离矿柱的方案来隔离上部采空区.在钻孔探测确定采空区形态的基础上,应用FLAC3D程序建立三维数字模型,分析了留设不同厚度隔离层对整个采空区应力分布的影响及自身稳定程度.结果表明:留设25 m厚的水平隔离矿柱可以有效地分担地压分布情况,能够保证下部矿体安全开采.更多还原

【Abstract】 Local goaf collapse at-320 m level in Longqiao Iron Mine has caused the unknown goaf shape.Under the condition of unpermitted surface subsidence,in order to ensure the deep ore bodies safety,the interval layer should be remained.Based on the drilling detection,the goaf shape was definitely known,and then the FLAC3D was applied to analyzing the influence of stress distribution in the whole goaf under the conditions of different interval layer thickness.The results showed that the 25 m interval layer remained in next level can effectively alleviate stress distribution.It can also ensure the mining safety at the next level.更多还原