为达到将废弃矿井的地下空间进行军事利用的目标,本文借助Flac3D软件模拟并研究废弃矿井旧巷道扩建弹药洞库在稳定性上的可行性。根据废弃矿山的巷道分布情况,结合弹药洞库的埋藏深度、安全相邻距离以及具体的断面参数等定量指标,确定了8座弹药洞库的具体布置。随后,在三维建模后模拟了某采区经历包括开拓、回采、充填3个过程在内的开采全过程后的废弃状态下的围岩稳定性,确定了某采区在稳定性上扩建弹药洞库的可行性。最后,通过再一次对弹药洞库的精细化建模后模拟并分析了扩建的8座弹药洞库的稳定性,结果表明:地表仅有小范围的拉应力集中但并未破坏,绝大部分地下巷道都具有很好的稳定性,局部的破坏主要集中在巷道的拱顶和底板;以该断面参数扩建的8座弹药洞库基本上可以保证整体稳定。
To achieve the goal of utilizing the underground space of abandoned mines for military purposes, this paper uses the Flac3D software to simulate and study the feasibility of expanding abandoned mine tunnels into ammunition storage facilities in terms of stability. First, based on the distribution of the tunnels in the abandoned mine, and then combining the burial depth of the ammunition storage, the safe adjacent distance, and specific cross-sectional parameters and other quantitative indicators, the specific layout of eight ammunition storage facilities was determined. Subsequently, after three-dimensional modeling, the stability of the surrounding rock in a certain mining area was simulated after undergoing the entire mining process, including development, extraction, and backfilling, in its abandoned state. This determined the feasibility of expanding the ammunition storage facilities in terms of stability for a certain mining area. Finally, through further refined modeling of the ammunition storage facilities, the stability of the expanded eight ammunition storage facilities was simulated and analyzed, and the following conclusions were drawn: there is only a small area of tensile stress concentration on the surface but no destruction, most of the underground tunnels have very good stability, and local damage is mainly concentrated in the arch top and floor of the tunnels; the eight ammunition storage facilities expanded with these cross-sectional parameters can basically ensure overall stability.
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