|本期目录/Table of Contents|

[1]张发明,余成,胡梦蛟,等.大跨度地下洞室群围岩多尺度块体稳定性预测方法[J].地球科学与环境学报,2015,37(02):93-101.
　ZHANG Fa-ming,YU Cheng,HU Meng-jiao,et al.Multi-scale Block Stability Prediction Methods of Large Span Underground Cavern Group Surrounding Rock[J].Journal of Earth Sciences and Environment,2015,37(02):93-101.
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第37卷
期数:
2015年第02期
页码:
93-101
栏目:
工程地质
出版日期:
2015-03-15

文章信息/Info

Title:
Multi-scale Block Stability Prediction Methods of Large Span Underground Cavern Group Surrounding Rock
文章编号:
1672-6561(2015)02-0093-09
作者:
张发明; 余成; 胡梦蛟; 胡大可; 李学政
1. 河海大学 地球科学与工程学院，江苏 南京 211100; 2. 中国电建集团中南勘测设计研究院有限公司，湖南 长沙 410014
Author(s):
ZHANG Fa-ming;  YU Cheng;  HU Meng-jiao;  HU Da-ke;  LI Xue-zheng
1. School of Earth Science and Engineering, Hohai University, Nanjing 210098, Jiangsu, China; 2. PowerChina Zhongnan Engineering Corporation Limited, Changsha 410014, Hunan, China
关键词:
复杂岩体; 几何-力学耦合; 结构面; 块体; 稳定性分析; 地质成因; 地下洞室
Keywords:
complex rock mass;  geometry-mechanics coupling;  structural surface;  block;  stability analysis;  geological mechanism;  underground cavern
分类号:
P642.3;TU457
DOI:
-
文献标志码:
A
摘要:
组成地下洞室的围岩存在不同尺度结构面所切割形成的不同尺度、不同形态结构体。这些结构体是导致施工期围岩失稳的主要因素，而且在洞室开挖前无法确定其具体位置，给围岩加固设计带来了困难。由勘探平洞地质调查获得的结构面资料，依据不同尺度结构面的成因、规模，预测其在开挖面上的出露位置十分重要。从结构面成因角度考虑，运用几何-力学耦合模拟方法，建立大跨度地下洞室围岩岩体结构模型；依据断层机制，运用力学成因拟合规模较大的断层、破碎带、层面，而基于现场结构面调查统计的结果，应用随机模拟方法并结合结构面连通率特征拟合随机结构面；采用正交试验及块体理论，确定由结构面组合形成块体的几何形态，搜索多尺度块体的分布，确定特定块体、半特定块体与随机块体的分布；进一步采用极限平衡理论，分析可能发生破坏的块体，得出洞室开挖面上需要加固的块体；最后，开发了基于几何-力学成因的多尺度结构面组合稳定性分析程序UNDGD2.0。他还以某在建抽水蓄能电站工程为例，搜索洞室不同开挖面上的块体组合类型与规模，分析由结构面组合构成局部块体的稳定性，为地下洞室开挖方案的确定及设计优化提供理论依据。
Abstract:
The surrounding rock of underground cavern is a structure with different scales and forms carved by structural surface in different scales. These structures are the main factors causing the instability of surrounding rock during the construction period, and the specific location is uncertain before the excavation of underground cavern, so that it is difficult to reinforce the surrounding rock. It is important to predict the outcrop position of structure surface on the excavation surface based on the genesis and scale of structural surface with different scales, according to the structure surface data investigated by exploration cavern. From the genesis of structural surface, structure model of surrounding rocks of large span underground cavern was built by geometry-mechanics coupling simulation method. The fitting of large scale fault, fracture zone and bedding surface was calculated according to the mechanical genesis and fault mechanism. The fitting of random structural surface was calculated with random simulation method by the characteristics of joint persistence ratio of structural surface according to the statistical results of field structural surface. Geometric forms of blocks composed by structural surfaces were confirmed based on orthogonal test and block theory, the distribution of multi-scale blocks was searched, and the distributions of special, semi-special and random blocks were found. Further, the blocks, which might be destroyed, were found and reinforced on the excavation surface of cavern by ultimate balance theory. Finally, the program UNDGD2.0 was developed to analyze the stability of multi-scale structural surface combination based on the geometry-mechanics genesis. A pumped storage power station under construction was taken as an example, the types and scales of block combination on different excavation surfaces in underground cavern were searched, and the stability of partial blocks composed by structural surfaces was analyzed in order to confirm and design optimally the excavation scheme of underground cavern. The results show that the research findings are rational.

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备注/Memo

备注/Memo:
收稿日期:2014-12-02
基金项目:中国水利水电科学研究院开放基金项目(IWHRO2009011);“十一五”国家科技支撑计划项目(2008BA29B03-2)
作者简介:张发明(1963-),男,浙江浦江人,教授,博士研究生导师,工学博士,博士后,E-mail:zhangfm@hhu.edu.cn。
更新日期/Last Update: 2015-04-02