复杂空区群影响下矿山边坡稳定性数值模拟

Study on the Influence of Complex Mined-out Area Group on Stability of Mine Slope with Numerical Simulation

以河北某金矿多年开采形成的复杂空区群为背景,利用FLAC3D建立三维计算模型,研究空区群影响下的露天开采边坡稳定性,选取典型剖面计算了边坡稳定安全系数。结果表明:空区的存在对边坡的整体稳定性影响不大,但靠近边坡边帮的空区可能引起边坡的局部失稳;空区经废石非胶结充填方式处理后,边坡安全系数能显著提高,稳定性有明显改善。该研究方法可供类似矿山借鉴。

Based on the complex mined-out area group of gold deposit in Hebei, the three dimensional calculation model is built with FLAG3D, and used to study the stability of mine open-pit slope under the influence of complex mined-out area group, and the safety factors of slope stability in typical sections have been calculated. The results show that the mined- out area group has litde impact on the overall stability of slope. However, the mined-out area near the slope may cause local instability. The slope safety factor is advanced significantly when it has been filled with waste, and the stability is improved obviously. This research method can be as a reference for similar mines.