One plastic gradient model of zonal disintegration of rock mass near deep level tunnels

被引：12
|
作者：
Wang, M. Y. [1 ]
Qi, C. Z. [2 ]
Qian, Q. H. [1 ]
Chen, J. J. [1 ]
机构：
[1] PLA Univ Sci & Technol, Nanjing 210007, Jiangsu, Peoples R China
[2] Beijing Univ Civil Engn & Architecture, Beijing Res Ctr Engn Struct & New Mat, Beijing 100044, Peoples R China
来源：
JOURNAL OF MINING SCIENCE | 2012年 / 48卷 / 01期
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
deep-level tunnel; zonal disintegration; internal variable; gradient plasticity; DEFORMABLE MEDIUM FAILURE; UNDERGROUND WORKINGS;
D O I：
10.1134/S1062739148010066
中图分类号：
TD [矿业工程];
学科分类号：
0819 ;
摘要：
In the present paper zonal disintegration phenomenon is investigated within the framework of gradient theories of elastic-plastic solids. Gradient of effective plastic strain is introduced as additional internal variable. Equilibrium equation and boundary conditions are obtained by using virtual work principle. Evolution equations for internal variables are obtained by using Clausius-Duhem inequality. For circular tunnels the governing equation for effective plastic strain is obtained from the above model. Solution of the governing equation for ideal brittle rock mass model is obtained. The obtained solution may describe zonal disintegration phenomenon very well.
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页码：46 / 54
页数：9
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