长江科学院院报 ›› 2013, Vol. 30 ›› Issue (6): 52-57.DOI: 10.3969/j.issn.1001-5485.2013.06.012

• 岩土工程 • 上一篇    下一篇

随机块体统计分析及其工程支护意义

沈育民a,张奇华b   

  1. 长江科学院 a.长江科创科技发展有限公司;b.水利部岩土力学与工程重点实验室,武汉 430010
  • 收稿日期:2013-06-04 修回日期:2013-06-04 出版日期:2013-06-04 发布日期:2013-06-04
  • 作者简介:沈育民(1955-),男,浙江嵊州人,高级工程师,主要从事工程岩体稳定性分析与加固技术研究和工程建设管理,(电话)027-82820020(电子信箱)cjkcgs@mail.crsri.cn。

Statistical Analysis of Stochastic Block andIts Significance in Rock Support

SHEN Yu-min, ZHANG Qi-hua   

  1. Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2013-06-04 Revised:2013-06-04 Online:2013-06-04 Published:2013-06-04

摘要: 随机块体统计分析对于深入认识随机块体发育特征,定量分析块体系统支护参数具有重要意义。在随机块体几何搜索分析结果的基础上,对随机块体大小及平均大小等的统计分布规律进行研究。结果表明:块体大小满足负指数分布规律,块体平均大小及覆盖率满足分布。在随机块体统计分析结果基础上,提出了确定块体系统支护设计参数的分析思路,例如根据块体埋深的分布规律,通过可靠度思想,可以确定锚杆长度。研究成果揭示了随机块体的统计分布规律,并为随机结构面切割下的块体支护分析探索了一个新的方法。

关键词: 随机块体, 随机块体搜索, 块体统计分析, 块体分布规律, 块体支护

Abstract: Statistical analysis of stochastic block is of great significance in understanding the characteristics of stochastic block development and the determination of quantitative support parameters for the block. On the basis of the results of geometrical identification of stochastic block, we studied the statistical distribution regularity of block size and average size. Analysis results indicate that the block size is consistent with negative exponential distribution, while the average size and coverage follow Γ distribution. Furthermore, the determination of parameters for block support design is discussed, for example, according to the distribution regularity of block’s burial depth, the length of rock bolt can be determined based on the reliability theorem. This research reveals the statistical distribution law of stochastic blocks and provides a new approach for rock block support analysis in the presence of stochastic discontinuity cutting.

Key words: stochastic block, identification of stochastic block, statistical analysis of block, law of block distribution, rock block support

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