【作者】 杨凯；

【导师】 陈建宏；

【作者基本信息】 中南大学 ， 采矿工程， 2012， 硕士

【摘要】 兰伯特角露天矿是一座大型露天矿山,开采形成的最终边坡将高达400多米。露天矿的边坡角是影响矿山投资、成本及生产安全的重要因素,边坡角的确定直接影响露天境界剥采比的确定,最终影响到露天矿整个生产过程中的经济效益。开展合理边坡角的研究目的在于优化开采设计,分析提高边坡角的可行性,减少开采成本,保证开采安全。露天高陡边坡稳定性分析及边坡角优化是一个复杂的系统工程,其根本是如何保证露天矿的生产能力和安全性,既要保证露天矿剥离量的经济,又要保证边坡的安全稳定。本论文的主要研究工作与内容如下：①根据地质勘查的地质地形图,利用CAD软件建立边坡模型,为边坡稳定性分析和边坡角优化奠定基础；②通过工程地质调查和岩石力学测试结果,利用FLAC3D对兰伯特角铁矿边坡角方案进行数值模拟并进行稳定性分析,利用强度折减法计算边坡的安全系数；③利用FLAC3D软件和理正岩土系列软件对兰伯特角铁矿各边坡角方案进行对比分析,确定经济合理、安全可靠的边坡角。取1.3作为安全系数的设计限值,得到优化结果为：北区上盘台阶坡面角可取为74。,中区上盘台阶坡面角可取为71。,南区上盘台阶坡面角可取为70。,各区下盘都采用初步设计的65。更多还原

【Abstract】 Cape Lambert Open Pit Mine is a large surface mine, the final slope after exploitation will reach up to over four hundred meters. The slope angle of open pit mining is an important factor that affect investment, cost and production safety. Slope angle has direct impact on open pit realm stripping ratio and affects the economic benefits of the entire production process ultimately. The research of get a reasonable slope angle aims to optimize the exploitation design, analysis the feasibility to improve slope angle, reduce the cost of mining, and ensure mining safety. The high and steep open pit slope stability analysis and slope angle optimization is a complex system engineering. Its fundamental is how to ensure that the open pit production capacity and security, that is we must ensure not only the economical stripping volume but also the slopes’security and stability. The main research work and content as follows:〢ccording to the geological and topographical map, using CAD software to create the slope model, and lay the foundation for slope stability analysis and slope angle optimization;(D According to engineering geological investigations and rock mechanics test results, using FLAC3D software to conduct slope numerical simulation and stability analysis, and using the strength reduction method to calculate the safety factor;︰sing FLAC3D software and LIZHENG geotechnical series software to analysis and compare all the slope angle scheme, and determine the economic, reasonable, safe and reliable slope angle.Take1.3as the design limits of the safety factor and get optimized results: the slope angle of northern zone’s hanging wall is74°, the slope angle of central zone’s hanging wall is71°, the slope angle of southern zone’s hanging wall is70°, the slope angle of all zone’s footwall is65°更多还原