黄金科学技术 ›› 2019, Vol. 27 ›› Issue (6): 851-861.doi: 10.11872/j.issn.1005-2518.2019.06.851
Yuan GAO(),Qingfa CHEN(),Tenglong JIANG
摘要:
矿山岩土工程数值分析中研究复杂空区群三维数值模型构建方法对空区治理具有现实意义。为精确分析矿山地下工程围岩移动和应力变化规律,特别是不同采矿方法形成的复杂空区的稳定性和矿柱应力变化,提出了3DMine-Surfer-Rhino-ANSYS-FLAC3D多软件联合建模方法,解决了复杂空区群三维数值模型构建和大数量小尺寸矿房矿柱网格剖分问题。以广西大新锰矿矿体开采为案例,构建了留矿法与房柱法形成的采空区的三维数值模型,模拟分析空区的稳定性和决策胶结充填治理方案。研究结果表明:(1)大新锰矿留矿法开采的空区部分顶柱有垮落风险;(2)房柱法开采的空区部分矿柱变形大,有塑性破坏;(3)对于胶结充填留矿法的空区,隔一充一充填方案治理效果更好,在治理初期地表沉降更小。
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