Zonal disintegration mechanism of cross-anisotropic rock mass around a deep circular tunnel under dynamic unloading

被引：21

作者：

Zhou, X. P. ^{[1
,2
,3
]}

Bi, J. ^{[1
]}

机构：

[1] Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China

[2] Chongqing Univ, Minist Educ, Key Lab New Technol, Construct Cities Mt Area, Chongqing 400045, Peoples R China

[3] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400045, Peoples R China

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2012年 / 60卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Zonal disintegration; Cross-anisotropic; Dynamic unloading; Deep circular tunnel; UNDERGROUND WORKINGS; FAILURE CRITERION; STRENGTH; MINES; HOEK;

D O I：

10.1016/j.tafmec.2012.06.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A mechanical model is proposed to investigate zonal disintegration mechanism of cross-anisotropic rock masses around a deep circular tunnel subjected to dynamic unloading under hydrostatic pressure condition as well as the total elastic stress-field distributions. Effects of unloading rate and dynamic mechanical parameters on the zonal disintegration phenomenon of the surrounding rock masses around a deep circular tunnel as well as the total elastic stress field distributions are taken into account. Numerical computation is carried out. The location, number and size of fractured and non-fractured zones are determined using the Hoek-Brown criterion. It is found from numerical results that the location, number and size of fractured and non-fractured zones significantly depend on unloading rate and dynamic mechanical parameters of deep rock masses. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：15 / 22

页数：8

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