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Investigation of slope stability for a section of Phelps Dodge Sierrita mine

机译：Phelps Dodge Sierrita矿区的边坡稳定性研究

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摘要

The first part of the paper deals with the development of a three-dimensional mine visualization model for a section of the mine. Discontinuity orientation, location, including the three-dimensional coordinates of start and ending points were taken directly from this visualization model for use in slope stability analyses. The results of the laboratory tests performed on samples obtained from the mine to estimate shear strength properties of discontinuities and properties of intact rock are discussed in the second part of the paper. The third part of the paper is focused on the results obtained for maximum safe slope angles for the section considered of the mine based on the kinematic and block theory analyses conducted under only the gravitational forces using the mapped discontinuities at the mine. The effects of water that exist in the rock mass, a tension crack, slope face inclination, overall wedge height and double benching on factor of safety of wedge stability are illustrated through limit equilibrium slope stability analyses conducted on a single tetrahedral wedge belonging to "potential key block" category that exist in the investigated area of the mine.
机译：本文的第一部分讨论了针对某矿区的三维矿井可视化模型的开发。不连续性方向，位置（包括起点和终点的三维坐标）直接从此可视化模型中获取，用于边坡稳定性分析。在论文的第二部分中讨论了对从矿山获得的样品进行的实验室测试结果，以估计不连续性的剪切强度特性和完整岩石的特性。本文的第三部分集中在基于运动学和分块理论的分析（仅在重力作用下，使用矿井处的映射不连续点进行）的运动学和分块理论分析的基础上，获得了该矿区最大安全倾斜角的结果。通过对属于“潜力”的单个四面体楔块进行极限平衡边坡稳定性分析，说明了岩体中存在的水，张应力裂缝，坡面倾角，整体楔形高度和双重台阶对楔形稳定性安全系数的影响。矿区中存在的“关键块”类别。

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