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中文摘要：
厚层冲积层下煤层的安全开采是林南仓矿东一采区遇到的最大问题之一。在分析东一采区开采具体情况和开采方式的基础上,构建了符合实际情况的工程地质模型和力学模型。应用目前最先进的FLAC3D软件对东一采区的煤11和煤12的覆岩变形破坏进行了模拟。模拟结果表明,煤11开采引起上覆岩层最大下沉值为2.75m,引起上覆岩层发生塑性屈服破坏的最大高度为31m,上覆岩层处于拉应力状态区域的最大高度为27m。煤12开采引起上覆岩层下沉,最大位移量为5.42m。煤12开采后上覆岩层发生塑性屈服破坏的最大高度为47m,上覆岩层处于拉应力状态区域的最大高度为43.3m。
英文摘要：
A safety mining in a seam under a thick alluvium is one of the big problems occurred in East No.1 Mining Block of Linnancang Mine.Base on the analysis on certain conditions of the mining and the mining method of the East No.1 Mining Block,a engineering geological model and the mechanics model suitable to the actual conditions were established.A present advanced FLAC3D software was applied to simulate the deformation and failure of the overburden strata above No.11 seam and No.12 seam in East No.1 Mining Block.The simulation results showed that the mining in No.11 seam would cause the overburden strata with a max subsidence of 2.75m,would cause a plastic yield failure with a max height of 31m in the overburden strata and the max height of a region in tension stress in overburden strata was 27m.The mining in No.12 seam would cause subsidence in the overburden strata and the max displacement was 5.42m.After the mining operation completed in No.12 seam,the overburden strata would have a plastic yield failure with a max height of 47 m and the max height of the region in tension in the overburden strata was 43.3m.
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