【摘要】 文本针对东露天煤矿槽仓黄土高边坡,利用有限元方法,进行了边坡开挖前后变形规律的数值分析。黄土高边坡开挖后发生较大位移,针对未支护开挖条件下的边坡位移发展分布规律与应力集中区域的模拟结果,对重点支护部位进行动态设计防护。相比物理试验研究,数值试验具有许多优势,对数值模拟结果进行分析,拟在边坡坡面采用锚杆与土钉联合支护方法,在边坡直臂段采用钢内撑与护坡桩联合支护方法。模拟结果表明,该支护方案可以均衡应力分布,有效抑制水平位移的扩大,为边坡重点加固区域的动态设计施工提供了科学依据,达到了工程安全等级的设计要求。更多还原

【Abstract】 The limit equilibrium method(FEM) is used to analyze the deformation rule of loess high slope at Dong Loutian coal mine before and after excavation.The larger displacement of the loess high slope will happen after excavation.The dynamic design method is used for the important protection location according to the displacement development rule and stress concentration region in numerical analysis.The slope surface is supported by anchors and soil nails.The straight arm segment of slope is supported by steel internal bracing and slope protection piles.The simulation results show that the stress field redistributes after excavation and reinforcement and the horizontal displacement of the slope is inhibited effectively.It provides the scientific basis for dynamic design and construction of the important reinforcement region of slope.The design project can be satisfied with the design requirements of engineering safety grade.更多还原