露天矿边坡损伤与可靠性变化规律的数值分析  

Numerical analysis of changing law of rock damage and reliability of open-pit mine slope

作　　者：孟达[1] 常来山[2] 黄霆[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]辽宁科技大学资源与土木工程学院,辽宁鞍山114044

出　　处：《辽宁工程技术大学学报（自然科学版）》2007年第4期538-540,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50274069)

摘　　要：以鞍钢眼前山露天铁矿南帮节理岩体边坡为工程背景,综合应用FLAC-3D、损伤力学、断裂力学和可靠性分析等多项理论和方法,系统研究了露天矿边坡的节理岩体伴随采矿开挖的概率损伤分析程序,定量揭示了边坡岩体概率损伤分布及演化规律。综合考虑节理、岩石和岩体初始损伤状态的抗剪强度,结合露天矿开挖的FLAC-3D模拟与损伤断裂力学分析,根据Monte-Carlo原理和极限平衡理论建立了露天矿节理岩体边坡的三维稳定性和可靠性动态评价模型,探讨了眼前山铁矿南帮+21 m铁路运输平台的节理岩体边坡在矿山不同开采深度的稳定性和可靠性的动态变化规律。Based on the jointed rock mass of the south slope of Yanqianshan Open Iron Mine, the theories and approaches, such as FLAC-3D numerical simulation, damage mechanics, fracture mechanics, reliability analysis, and so on, are comprehensively applied. The assessment and working process of the probability damage and the evolution are systematically studied with the excavation of the rock slope. The spatial distribution and evolution of the damage deterioration of the rock slope are quantitatively shown. The shear strength of the joint, the intact rock and the preliminary damage rock mass are considered. Associated with the analysis of FLAC-3D and damage-fracture mechanics, and based on Monte-Carlo principle and limit equilibrium theory, the dynamic assessment model of 3-D dynamic stability and reliability is established of the jointed rock slope. The dynamic evolution law of stability and reliability of the slope of ＋21 m horizon railway haulage platform is discussed at different excavation depths.

关 键 词：损伤演化 可靠性 数值模拟 节理岩体 

分 类 号：O346.5[理学—固体力学] P642.22[理学—力学]