Evaluation method of general geostress based on spalling features of wall rock

JIANG Quan; FENG Xia-ting; XU Ding-ping; ZHAO Yang; JIANG Ya-li; HUANG Ke

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Evaluation method of general geostress based on spalling features of wall rock

更新时间：2026-06-25

- Evaluation method of general geostress based on spalling features of wall rock
- Vol. 32, Issue 5, (2011)
- 作者机构：
  
  1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉,430071
  2. 中国水电顾问集团华东勘测设计研究院,杭州,310014
- 作者简介：
- 基金信息：
- DOI：
  CLC： U451+.2
- Online First：23 September 2011，
  
  Published：2011
- 稿件说明：
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JIANG Quan, FENG Xia-ting, XU Ding-ping, et al. Evaluation method of general geostress based on spalling features of wall rock[J]. 2011, 32(5).
DOI：

JIANG Quan, FENG Xia-ting, XU Ding-ping, et al. Evaluation method of general geostress based on spalling features of wall rock[J]. 2011, 32(5). DOI：

摘要

基于深部地下勘探隧洞围岩应力型片帮破坏是岩体初始地应力作用的最直观结果的认识，建立借助围岩片帮形迹分析工程区岩体宏观地应力的估计方法。该方法通过对比分析地应力作用下多个交叉隧洞围岩的片帮空间分布特征和烈度强弱关系，建立岩体3个初始主应力的空间大小和方向关系；采用片帮劈裂纹方位角统计获得岩体最大主应力方向；依据片帮的应力门槛值和起裂应力门槛值估算出3个主应力量值。现场实测地应力数据和多工况数值计算分析都有力地表明，借助该分析方法获得的白鹤滩右岸厂址区域三维地应力是科学、合理的，这也为深入认识工程区地应力特征提供了一条新思路

Abstract

According to the viewpoint that the kind of brittle spalling of wall rock is the embodiment of in-situ rock stress

a new evaluation method of general geostress is put forward based on spalling features of wall rock. Firstly

the spatial relationship of three principal stresses is gained through the analysis of spalling features of wall rock from the aspect of spatial distribution and intensity relation. Then

the direction of maximum principal stress is counted according to the trend of spalling’s split veins. The values of three principal stresses are calculated also based on the stress threshold values of spalling and threshold values of crack initiation. The in-situ stress evaluation of right powerhouse region in Baihetan hydropower station is validated by the local measured in-situ rock stress results and contrastively numerical analysis of different directions of maximum principal stress

which prove that the method is reasonable and useful for understanding the break of wall rock and checking the measured in-situ rock stress results.

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