东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (4): 568-572.DOI: 10.12068/j.issn.1005-3026.2016.04.024

• 资源与土木工程 • 上一篇    下一篇

基于不稳定块体失效概率的开挖面稳定性分析

王存根1, 王述红1, 穆檄江2, 昝世明1   

  1. (1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 中国南方航空股份有限公司 北方分公司, 辽宁 沈阳110004)
  • 收稿日期:2015-02-10 修回日期:2015-02-10 出版日期:2016-04-15 发布日期:2016-04-05
  • 通讯作者: 王存根
  • 作者简介:王存根(1990-),男,河北衡水人,东北大学博士研究生; 王述红(1969-),男,江苏泰州人,东北大学教授.
  • 基金资助:
    国家自然科学基金资助项目(51474050,51179031,51074042); 国家自然科学基金外国青年学者研究基金资助项目(51250110531,51350110534); 国家重点基础研究发展规划项目(2013CB227902);地质灾害防治与地质环境保护国家重点实验室项目(SKLGP2012K009,SKLGP2014K011); 辽宁省高等学校优秀人才支持计划项目(LN2014006); 国家高端外国专家项目(GDT20142100008,GDW20142100050).

Stability Analysis of Excavation Surface Based on Failure Probability of Unstable Block

WANG Cun-gen1, WANG Shu-hong1, MU Xi-jiang2, ZAN Shi-ming1   

  1. 1.School of Resources & Civil Engineering, Northeastern University, Shenyang 110819,China; 2. North Branch, China Southern Airlines Co, Ltd., Shenyang 110004,China.
  • Received:2015-02-10 Revised:2015-02-10 Online:2016-04-15 Published:2016-04-05
  • Contact: WANG Shu-hong
  • About author:-
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摘要: 基于团队开发的空间网络模型,利用一般块体理论进行块体分析,可以得到开挖面上不稳定块体的安全系数、体积及其棱长.利用棱长和迹长推出块体生成概率,并与安全系数一起求出块体失效概率.然后将失效概率大于失效标准的块体定为失效块体,并提出将开挖面上失效块体体积占所有不稳定块体体积的比例作为评价开挖面稳定性的指标,从而提出基于不稳定块体失效概率的开挖面稳定性分析方法.基于一个实际边坡工程,利用上述方法对其进行开挖面稳定性分析.

关键词: 不稳定块体, 失效概率, 开挖面, 稳定性, 结构面

Abstract: Based on the spatial network model developed by our team, the general theory of block was used for block analysis, the safety factor, the volume and the edge length of unstable blocks in the excavation surface were obtained. The block generation probability can be first determined by the edge length and the trace length, then the block failure probability was calculated by the block generation probability and the safety factor. The failure block was identified when the failure probability of block is greater than the standard value. The ratio of the failure volume of rock blocks to the unstable volume of rock blocks was used as an evaluation index on the excavation surface stability, and a stability analysis method of the excavation surface was proposed on the basis of the unstable blocks failure probability. An example was given to evaluate the stability of the excavation surface based on this method.

Key words: unstable block, failure probability, excavation surface, stability, structural plane

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