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金属矿山 ›› 2009, Vol. 39 ›› Issue (05): 158-160.

• 安全与环保 • 上一篇    下一篇

关键块体稳定影响因素主成分分析

孟衡,李建林,王乐华,邓华锋   

  1. 三峡大学
  • 出版日期:2009-05-15 发布日期:2011-11-09
  • 基金资助:

    * 湖北省自然科学基金项目(编号:2008CDB366),宜昌市科学技术研究与开发项目(编号:A08303-03),三峡库区地质灾害教育部重点实验室主任基金项目(编号:2008ZRJ05),三峡大学青年科学基金项目(编号:603120)。

Principal Component Analysis of Influencing Factors of Key Block Stability

Meng Heng,Li Jianlin,Wang Lehua,Deng Huafeng   

  1. China Three Gorges University
  • Online:2009-05-15 Published:2011-11-09

摘要: 块体理论是由我国学者石根华首先在国内提出的,主要用于分析研究块体在三维空间的几何形状以及运动可能性问题。其核心可归结为排除无限块体和不可动块体找出临空面上的关键块体,对其进行分析研究并对可能失稳的块体提出合理的加固措施。用该理论来分析岩质边坡稳定性时,影响关键块体稳定性因素较多。结合均匀试验设计方法,考虑岩质边坡开挖以后的卸荷的影响,选用构成块体的2组结构面的黏聚力、摩擦角、以及地震动峰值加速度5个因素的影响来进行分析研究,评价各因素对岩质边坡关键块体稳定性的影响程度。为实际工程建设提供一定的建议。

关键词: 块体理论, 关键块体, 卸荷, 均匀试验设计方法

Abstract: The block theory, which was first proposed by Shi Genhau, a Chinese scholar, is mainly used for analyzing the geometric shape and movement possibility of blocks in 3D space. Its key is to eliminate unlimited blocks and movable blocks, find out and study the key block at free face, and propose rational reinforcement measures for potential instable blocks. There are many factors influencing the stability of key blocks when this theory is used in analyzing the stability of rocky slope. In this paper, the influence of unloading due to the excavation of the rocky slope is considered by using uniform test design method, and the effect of five factors such as cohesion, friction angle and seismic peak acceleration on the stability of key blocks of rocky slope is studied and evaluated, providing some references to practical engineering construction.

Key words: Block theory, Key block, Unloading, Uniform test design method