In order to reasonably determine thickness of the interlayer between the two layers of the room, to ensure the stability of stope, 3D finite element numerical simulation software FLAC3D is used, and combined with the engineering practice, 7 kinds of interlayer thickness is established for numerical simulation. Calculation shows that when the room span is 36m, the stope stability coefficient decreases along with interlayer thickness decreasing, the 14m thickness of the interlayer is the critical. At the same time, in the mining, timely filling can improve the safety coefficient of the stope, and when leaving a goaf in production, the remaining mined areas should be filled in time, interlayer thickness is control in 10m to 14m, the stope can be in a stable state. The results of the study can provide some theoretical basis and reference for the relevant examples.%为合理确定矿房上下两层之间合理的隔层厚度,以确保采场的稳定性,采用三维有限元数值模拟软件FLAC3D,结合工程实际,建立了7种隔层厚度进行数值模拟计算.计算分析表明,采场稳定安全系数在矿房跨度36m时随隔层厚度的减小而降低,隔层厚度为14m时为临界隔层厚度,同时得出,在回采后,及时的进行充填可以提高采场的安全系数,且生产时若留一个采空区,其余采空区采后及时充填,隔层厚度控制在10m到14m间可使采场处于稳定状态.研究的结果可以为相关实例提供一定的理论依据和参考.
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