群采空区下浅部岩爆诱发机制研究

针对玲珑金矿西山坑口131号矿脉-50中段花岗岩的浅部岩爆灾害, 进行了现场勘察以及地质调查, 发现岩爆发生区域上部存在大量未处理的群采空区。采取样本进行了室内倾向性试验, 发现该区域花岗岩具有中等至强岩爆倾向性。依据调查所得地质资料和矿山生产资料进行了矿山三维可视化建模并进行了地应力计算, 分析岩爆发生区域的应力状态。依据计算分析并圈出了潜在岩爆地质灾害的区域, 提出了群采空区下浅部岩爆的诱发机制及防护建议。

The Induced Mechanism for Shallow Rock Burst below Group Goafs

In response to the severe rock burst occurred at the -50 middle section of №131 vein at Xishan pithead in Linglong Gold Mine, on-site inspections and geological surveys were conducted and it is found that there was a group of goafs left over the rock burst areas without taking any measures. Laboratory experiments on rock burst tendency showed that the granite in this area possesses a moderate-to-vigorous tendency for rock burst. The following 3D visualized modeling with the obtained geological data and mine production information was used to calculate its ground stress and analyze the stress states of the rock burst areas. Based on the calculation results, the potential rock burst areas were marked out, and preventing measures were proposed in the last section of this paper based on the inducement mechanism.