【摘要】 为解决采空区下薄顶煤巷道支护设计中所面临的各种力学问题,通过七因素三水平的正交实验方案,进行了27次数值模拟实验.按照三个评价标准,分别分析了各关键因素对巷道稳定性的影响,并筛选出相应的最优方案.利用灰色模糊理论对巷道支护方案进行了综合评价及整体优化设计.研究中考虑了支护费用及施工时间等成本性指标,分析了巷道支护后围岩的应力变化、位移特征和破坏机理,制定了可行的施工方案.所采用的支护技术在窑街煤电公司天祝矿正式投入使用后,取得良好的经济效益.更多还原

【Abstract】 In order to solve the mechanical problems during tunnel-supporting design under the mined gob with a thin roof coal seam,orthogonal experiments with 7 factors and 3 levels including 27 numerical simulations were carried out.The influence of the key factors on the tunnel stability was analyzed and corresponding optimized schemes were chosen according to 3 evaluation standards.The grey-fuzzy theory was utilized to make comprehensive evaluation and overall optimizing design.Cost factors such as supporting expense and construction time were considered during the study.The stress transformation,displacement character and failure mechanism of wall rock after support were analyzed,and a feasible construction plan was established.After utilizing the introduced supporting technique formally in Tianzhu Mining Zone of Yaojie Coal-electricity Inc.in China,favorable economical benefit is brought.更多还原