考虑中间主应力的非均匀应力场圆形巷道围岩塑性区分析

doi:10.11799/ce201403022

煤炭工程 ›› 2014, Vol. 46 ›› Issue (3): 68-71.doi: 10.11799/ce201403022

考虑中间主应力的非均匀应力场圆形巷道围岩塑性区分析

李涛¹,赵光明¹,孟祥瑞¹,张小波²

1. 安徽理工大学
2. 安徽理工大学能源与安全学院

收稿日期:2013-07-05 修回日期:2013-08-06 出版日期:2014-03-14 发布日期:2014-03-15
通讯作者: 李涛 E-mail:litaocl511@tom.com

Plastic zone analysis of surrounding rock in circular roadway under non-uniform stress field with considering intermediate principal stress

Received:2013-07-05 Revised:2013-08-06 Online:2014-03-14 Published:2014-03-15

摘要/Abstract

摘要：

基于Drucker-Prager准则，引入中间主应力系数，推导出不同侧压系数下巷道围岩塑性区边界线方程，用于预测不同侧压系数下巷道围岩塑性区的大小和形状。用单因素分析法，考虑不同中间主应力下，巷道围岩塑性区半径的变化规律。在侧压系数的时候，对在D-P准则下和在Mohr-Coulomb准则下巷道围岩塑性区的大小进行比较。侧压系数越偏离于1，巷道围岩塑性区水平方向和垂直应力侧差异增加，对围岩塑性区的大小和形状影响也越大；随中间主应力增大，塑性区范围越小。因此，适当考虑中间主应力的影响，可保证工程安全性的同时取得更大的经济效益。

关键词: 非均匀应力场, 圆形巷道, 围岩塑性区, 侧压系数, 中间主应力

Abstract:

With the use of Drucker-Prager principle, derive the plastic zone boundary line equation of the roadway, and predict the size and shape of the plastic zone of surrounding rock on different pressure coefficient; The introduction of the intermediate principal stress coefficient, using univariate analysis, projections the variation of the radius of the plastic zone of surrounding rock stand-by different intermediate principal stress. when we calculate the Lateral pressure coefficient, draw a compare between the dimension of roadway plasticity with the principle of D-P and M-C. More distance from 1 of Lateral pressure coefficient , more error between lateral stress and vertical stress of roadway plasticity ,and more influence to the dimension and direction of roadway. With the growth of middle Principal stress, the sphere of plasticity decrease. As a result, paying proper consideration will enhance the safety of engineer practise and more economic benefit in the days to come.

Key words: Non-uniform stress field, Circular roadway, Surrounding rock mass plastic zone, Side pressure coefficient, Intermediate principal stress

中图分类号:

TD322

李涛，赵光明，孟祥瑞，等. 考虑中间主应力的非均匀应力场圆形巷道围岩塑性区分析[J]. 煤炭工程, 2014, 46(3): 68-71.

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考虑中间主应力的非均匀应力场圆形巷道围岩塑性区分析

Plastic zone analysis of surrounding rock in circular roadway under non-uniform stress field with considering intermediate principal stress

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