土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (2): 234-238.

• 工程实录 • 上一篇    下一篇

某矿山边坡岩体强度参数取值分析

徐 敏1，刘正明1，许宝田2，刘开斌1，朱凌昊1   

  1. （1.江苏省地质矿产局第二地质大队，江苏常州 213300；2.南京大学地球科学与工程学院，南京 210046）
  • 收稿日期:2023-09-19 修回日期:2023-10-08 出版日期:2024-02-29 发布日期:2024-12-22
  • 作者简介:徐敏（1984-），男，研究生，高级工程师，研究方向为工程地质。
  • 基金资助:
    国家重点研发计划课题（2018YFC1802401）；江苏省地质矿产勘查局科技创新项目（2022KY04）

Analysis of Rock Mass Strength Parameters of an Open-Pit Mine Slope

XU Min1, LIU Zhengming1, XU Baotian2, LIU Kaibin1， ZHU Linghao1   

  1. (1.No.2 Geological Division, Jiangsu Bureau of Geology and Mineral Resource, Changzhou 213300；
    2.School of Earth Science and Engineering, Nanjing University, Nanjing 210046)
  • Received:2023-09-19 Revised:2023-10-08 Online:2024-02-29 Published:2024-12-22

摘要： 矿山边坡岩体强度参数是边坡稳定性分析和矿山开采设计的关键指标。工程上常用的岩体强度计算方法有Hoke-Brown法（H-B法）、费辛科法和格吉法。对各种方法得到的岩体强度参数进行了对比分析，并运用反分析法进行验证。分析表明，H-B法得出的黏聚力和内摩擦角分别为460 kPa和27°，费辛科法得到的黏聚力与H-B法接近，格吉法得到的黏聚力偏低。考虑岩体完整性和软化性对岩块内摩擦角进行折减后所得到的体内摩擦角为27°。反分析法计算得岩体黏聚力和内摩擦角分别为450 kPa和27°，综合分析认为H-B法最为可靠。结合稳定性计算结果，建议本矿山台阶坡角取值不宜超过60°。研究结果可为矿山边坡稳定性分析和开采设计提供依据。


关键词: 矿山边坡, 岩体, 强度参数

Abstract: The rock mass strength parameters of mining slopes are key indicators for the slope stability analysis and the mining design. The commonly used methods for estimating the rock mass strength indexes include the H-B, Feynko, and Georgi methods. This paper compares and analyzes the estimation results of the rock mass strength parameters obtained by various methods. The back analysis method is used to verify the estimation results from different theories. The rock mass strength parameters for the cohesion and the friction angles, obtained from H-B method, are 460 kPa and 27 °, respectively. The cohesion obtained by the Feynko method is close to that obtained by the H-B method, while the cohesion obtained by the Geggi method is relatively low. The cohesion and friction angle, from the back analysis method, are 450kPa and 27 °, respectively. The results indicate that the H-B method is the most reliable one. The friction angle of the rock mass can be obtained by reducing the friction angle of the rock blocks, by considering the integrity and the softening of the rock mass. Based on the stability estimation results, it is suggested that the slope angle of the studied mine steps should not exceed 60 °. The research results can provide a basis for the stability analysis and the mining design of mining slopes.

Key words: Open-Pit Mine, Rock Mass, Strength Parameters

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