黄金科学技术 ›› 2018, Vol. 26 ›› Issue (6): 736-743.doi: 10.11872/j.issn.1005-2518.2018.06.736
Jianhua HU(),Chen GAO,Chun YANG
摘要:
重叠矿体开采的相互作用和响应规律是影响矿山开采安全的重要因素。以镜铁山桦树沟铜矿与上部铁矿体的重叠矿段为研究对象,采用3DMine-Midas-FLAC3D耦合精细建模数值模拟技术,结合矿山实际工程和采充工序条件,建立了充填矿段铜矿体开采条件下的FeV矿体工程响应数值分析模型,获得了FeV矿体回采巷道等工程结构的位移和应力响应规律,对FeV矿体的开采进行了安全评价和分析。研究结果表明:(1)试验采场的采充过程中,FeV回采巷道2 865 m水平所受开挖扰动最大,最大位移达到2.3 cm,应力最大扰动幅度为11.34%,最大剪应力为1.27 MPa;(2)采充过程中,空区上方中心部分的Z方向应力会减小,应力向四周转移;空区上方中心位置剪应力无明显变化,剪应力在空区边缘变化明显;(3)在试验采场开采过程中,上部FeV矿体的2 880 m和2 895 m水平回采巷道处于稳定状态,建议矿山加快回采进度,实现强采强出,提高矿石回收率。
中图分类号:
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