某水电站坝区高地应力释放现象及成因研究

doi:10.11867/j.issn.1001-8166.2009.06.0636

地球科学进展 ›› 2009, Vol. 24 ›› Issue (6): 636 -642. doi: 10.11867/j.issn.1001-8166.2009.06.0636

某水电站坝区高地应力释放现象及成因研究

赵青 ^1,2,赵其华 ¹,彭社琴 ¹,陈近中 ¹,黄河清 ^1

1.成都理工大学地质灾害防治与地质环境保护国家重点实验室，四川成都 610059;2.贵州大学土木建筑工程学院，贵州贵阳 550003

收稿日期:2008-12-22 修回日期:2009-04-25 出版日期:2009-06-10
通讯作者: 赵青 E-mail:zhaoq330@163.com
基金资助:
四川省杰出青年学科带头人培养基金项目“开发边坡卸荷机理”(编号：04-zq026-016)资助.

A Study of Causes of High Ground Stress Release in the Area of a Hydropower Station Dam

Zhao Qing ^1,2, Zhao Qihua ¹,Peng Sheqin ¹,Chen Jinzhong ¹,Huang Heqing ¹

1.State Key Laboratory of Geohazards Prevention and Geoenvironment Protectation,Chengdu University of Technology, Chengdu 610059,China; 2.College of Civil Engineering, Guizhou University, Guiyang 550003, China

Received:2008-12-22 Revised:2009-04-25 Online:2009-06-10 Published:2009-06-10

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针对坝区特定的高应力条件下岩体的应力释放现象，包括岩芯饼裂和勘探平硐岩爆发育普遍的特征，在统计分析的基础上，从力源条件—区域构造背景和地质构造条件、能力存储条件—岩性特征和岩体结构条件、后期演化—能量释放、转换与调整等分析的基础上，结合坝区地应力场分布的特征阐述了坝址区高地应力成因，认为坝区高地应力释放现象是上述各因素综合作用的结果。为地下厂房开挖过程中的岩爆预测和控制提供了有力的参考依据。

关键词: 高地应力, 岩芯饼裂, 岩爆, 地质背景, 地质构造, 岩体结构, 应力集中

Based on statistical analysis of disced rock cores and rockburst about rock mass in exploration adit at the dam site where high ground stressis surrounded the causes of high ground stress are discussed in many respects, combined with characteristics of ground stress field, including the power source condition which is the regional tectonic setting and geological conditions, power storage conditions which is characteristic of lithology and structure of rock mass, power transformation and adjustment which is late reformation of rock mass. It is considered that high ground stress release is synthetical result caused by factors mentioned above. It provides the powerful reference for the prediction and control of rockburst in the excavation of underground powerhouse.

Key words: High ground stress, Disced rock cores, Rockburst, Tectonic setting, Geological conditions, Rock mass structure, Stress concentration.

中图分类号:

P642

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