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tshgth: 金币+5, ★★★很有帮助 2014-03-25 22:48:01
jssxh: 金币+3, 检索EPI+1, 谢谢参与，请继续关注本版块！ 2014-03-26 14:38:39
Response models of weakly consolidated soft rock roadway under different interior pressures considering dilatancy effect
作者:Zhao, ZH (Zhao Zeng-Hui)[ 1 ] ; Wang, WM (Wang Wei-Ming)[ 2 ] ; Wang, L (Wang Lei)[ 2 ]
JOURNAL OF CENTRAL SOUTH UNIVERSITY
卷: 20
期: 12
页: 3736-3744
DOI: 10.1007/s11771-013-1902-3
出版年: DEC 2013
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摘要
Surrounding rocks of weakly consolidated soft rock roadway show obvious strain softening and dilatancy effects after excavation. A damage coefficient concerning modulus attenuation was defined. Response models of stress and displacement of surrounding rock of soft rock roadway and analytical expressions to calculate plastic zones under different interior pressures and non-uniform original rock stresses were derived based on damage theories and a triple linear elastic-plastic strain softening model. Influence laws of dilatancy gradient on damage development, distributions of stresses and displacement in plastic region were analyzed. Interior pressure conditions to develop plastic region under different origin rock stresses were established and their influences on plastic region distribution were also discussed. The results show that the order of maximum principle stress is exchanged between sigma(theta) and sigma(r) with the increase of interior pressure P-0, which causes distributions of plastic zone and stress shift. Dilatancy effect which has great influences on the damage propagation and displacements in plastic region has little effect on the size of plastic region and stress responses. The conclusions provide a theoretical basis for a reasonable evaluation of stability and effective supporting of weakly consolidated soft rock roadway.
关键词
作者关键词:weakly consolidated soft rock roadway; dilatancy effect; modulus damage coefficient; cave interior pressure; response model
作者信息
通讯作者地址: Wang, WM (通讯作者)
Shandong Univ Sci & Technol, Coll Civil Engn, Qingdao 266590, Peoples R China.
地址:
[ 1 ] Shandong Univ Sci & Technol, Coll Sci, Qingdao 266590, Peoples R China
[ 2 ] Shandong Univ Sci & Technol, Coll Civil Engn, Qingdao 266590, Peoples R China
电子邮件地址:tgzyzzh@163.com
基金资助致谢
基金资助机构
授权号
National Natural Science Foundation of China
51174128
Specialized Research Fund for the Doctoral Program of Higher Education of China
20123718110007
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出版商
JOURNAL OF CENTRAL SOUTH UNIV TECHNOLOGY, EDITORIAL OFFICE, CHANGSHA, HUNAN 410083, PEOPLES R CHINA
类别 / 分类
研究方向:Metallurgy & Metallurgical Engineering
Web of Science 类别:Metallurgy & Metallurgical Engineering
文献信息
文献类型:Article
语种:English
入藏号: WOS:000331960900045
ISSN: 2095-2899
电子 ISSN: 1993-0666
期刊信息
Impact Factor (影响因子): Journal Citation Reports®
其他信息
IDS 号: AB7HR
Web of Science 核心合集中的 "引用的参考文献": 19
Web of Science 核心合集中的 "被引频次": 0
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19 引用的参考文献
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