马坑铁矿顶柱留设模拟研究  

Simulation Research on Leaving and Setting Top Pillar in Makeng Iron Mine

作　　者：李吴礼 袁海平[2] 付玉华[3] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州市341000 [2]合肥工业大学土木与水利学院,安徽合肥230000 [3]江西理工大学应用科学学院,江西赣州市341000

出　　处：《矿业研究与开发》2016年第12期8-12,共5页Mining Research and Development

摘　　要：为确定马坑铁矿+100m中段顶柱留设方案,利用Flac3D软件分别模拟顶柱留设在+205m分段和+190m分段的两种留设方案。模拟结果表明:矿柱产生的走向位移比矿房顶板产生的沉降位移大;随开采工作的进行塑性区体积不断增大,矿房跨度一定时,拉伸破坏区与矿房高度呈正相关关系;当矿房高度超过60m后,拉伸破坏区不再增加,破坏形式逐渐变为矿柱剪切破坏;顶柱留设在+190m分段的方案整体稳定性好,较+205m分段更为合理,研究结果可为顶住留设提供技术支持与参考。To determine the leaving and setting scheme of the ＋100 m top pillar in the middle of Makeng iron mine, Flac^3D was used to respectively simulate leaving pillar at the ＋205 m section and ＋190 m section. The simulated results showed that, the strike displacement of pillar was greater than the settlement displacement of mine roof; with the development of mining, the volume of plastic zone increased, and the tensile damage zone were positively correlated with the room height when the room span was stable; when the room height exceeded 60 m, the tensile damage zone would stop expanding, and damage forms gradually became shear failure of pillar. Finally, it found that leaving and setting pillar at the ＋ 190 m section had a good stability and was more reasonable than that at ＋ 205 m section. The results could provide technical support for leaving and setting top pillar.

关 键 词：顶柱留设 应力分析 安全系数 数值模拟 

分 类 号：TD853.391[矿业工程—金属矿开采]