【作者】 任高峰；

【导师】 张世雄； 张建华；

【作者基本信息】 武汉理工大学 ， 采矿工程， 2005， 硕士

【摘要】 随着越来越多的露天矿山转入深凹露天开采,有利于深凹边坡稳定性的最优边坡力学形状研究越来越受到人们所认识和重视。深凹露天矿岩质边坡稳定性分析是边坡工程中的一项重要工作,为了减少和防止各种深凹露天边坡事故的发生,有必要加强这类边坡稳定性分析方面的研究工作。 本文以《金堆城凹陷露天矿边坡形状力学优化研究》项目为依托,对深凹露天矿边坡的空间受力状态进行了分析,对边坡形状进行了优化研究。通过对小北露天坑现场边坡岩体节理裂隙产状的统计分析,初步确定了露天采场构造应力的方向:通过对边坡岩体内部位移监测找出了边坡内部岩体的变形规律;通过对边坡内部岩体声波测试研究探讨了边坡松弛层范围;通过有限元位移反分析研究确定了露天采场构造应力的大小;利用弹性力学方法分析了采场平面形状与水平构造应力之间的关系。在现场试验及室内计算研究的基础上,采用三维有限元数值模拟软件ANSYS 8.1建立了小北露天采场的有限元模型,计算并分析了边坡岩体的应力状态;通过ANSYS 8.1软件的优化模块进行了边坡力学形状优化研究,获得了适合于小北露天下步深凹开采的最佳采场方位及最优边坡形状。本文还对小北露天采场的生产爆破震动测试数据进行了分析,找出了爆破震动沿各帮边坡岩体的传播与衰减规律。利用同济大学启明星软件SLOPE 1.0完成了各帮边坡分别在自然状态下以及爆破载荷作用下的稳定性分析,为露天矿现场生产爆破提供了指导。更多还原

【Abstract】 During more and more open pit transiting to concavity open mining, people make much account of the study on the best slope mechanical configuration, which in favor of the stability of concavity slope. Rock slope stability analysis at open pit is an important work in slope engineering. In order to decrease and prevent all kinds of slope hazards at concavity open slope, it is necessary to enforce the research of stability analysis of this slope.This thesis relies on the Project of the Study on the Slope of the Concavity Open Pit at Jindui City. It analyzes the spatial force station and also optimizes the configuration of the slope. By occurrence statistics analysis of the joint and crack at little north open pit, the construction stress direction is obtained. The distortion regulation of inner slope rock mass is assured by displacement monitoring. It studies the slope loose layer range by inner rock supersonic wave measure of the slope. It ascertains the size of the construction stress by back analysis of displacement. By utilization of elasticity knowledge, it gets the relation between the shape of the plane stope and horizontal construction stress. On the basis of the field test and indoor calculation, a finite element model of little north open mining established by adopting the three-dimension software ANSYS 8.1. With the help of the software, it calculates and analyzes the stress state of the slope rock mass. By the study of the mechanical shape of the slope with optimization module of software ANSYS 8.1, we obtained the optimal open pit direction and the optimal slope configuration fit to the little north open mining. The thesis also analyzes the blast vibration data at the field and gains the law of blast vibration propagation and attenuation along each band. It accomplishes the stability analysis of every band at natural station and under blast pressure respectively by Tongji university software SLOPE 1. 0. This offers the guidance to the field blasting of the mine.更多还原