【摘要】 滑坡是常见地质灾害之一,其形成原因可以是自然的,也可以是人为的,或者是综合性的。因此,滑坡体的形成机制相当复杂,寻求可靠、有效的滑坡体理论计算与数值模拟分析方法是许多学者努力研究的方向。随着现代科学技术,尤其是先进的计算机数字建模技术的发展与进步,三维矿山模型的建立成为可能,为滑坡体稳定性分析与计算提供了一种新的途径。模型的建立以从各种渠道所获取的基础数据为前提,可以将研究对象的基本组成及其结构构造三维可视化,并赋予各组成部分关于几何形状、尺寸、空间分布要素(走向、倾向和倾角)以及物理力学性能方面的参数。将三维模型上任意截取的计算剖面与传统的极限平衡计算法结合起来,可轻松获得该计算剖面坡体稳定安全系数;将三维模型和功能强大的有限元分析软件结合起来,则可实现滑坡体的三维稳定性分析与计算。结合河南灵宝罗山矿区的滑坡体稳定性分析与治理课题,介绍了以MapGIS,AutoCAD及Surpac软件为主要工具的矿山三维建模的基本原理和步骤,获得部分关键计算剖面的稳定安全系数,为滑坡体的稳定性分析研究及其综合治理提供了依据。更多还原

【Abstract】 Slope collapse is one of the most common geological disasters,which is controlled by multi-factors.The mechanism of slope stability is very complicated,it is thus essential to study the method of theoretical calculation and numerical simulation.With the development of modern science and technology,especially some advanced numerical simulation technologies,it becomes possible to build up a viable 3D mine model and then provides a new analysis method for slope stability.The basic principles and steps followed in the 3D numerical simulating process based on MapGIS,Surpac and AutoCAD are clearly introduced.The obtained numerical model will possess all kinds of information including the mechanical characteristics of materials and the geometrical parameters of geological discontinuities known from previous works.Both the whole geological structure and various geological components involved in a slope can be visualized on computer;the complicated analysis and calculation can be then carried out more effectively.The combination of 3D numerical model with some classical theories in slope stabilization can easily provide the stability factor,and the combination with other powerful finite element methods can realize more complicated calculation and offer more detailed results of stress and displacement.A case study,Luoshan Mine slope in Lingbao of Henan Province,is discussed.The stability coefficient in certain key cross-sections of slope is obtained,which can be useful in the slope stability studies.更多还原