|本期目录/Table of Contents|

[1]张楚旋,戴兵,吴秋红.不同应力路径下岩石卸荷破坏过程的变形特性与能量耗散分析[J].中国安全生产科学技术,2014,10(10):35-40.[doi:10.11731/j.issn.1673-193x.2014.10.006]
 ZHANG Chu-xuan,DAI Bing,WU Qiu-hong.Analysis on deformation properties and energy dissipation of rock unloading failure process under different stress path[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(10):35-40.[doi:10.11731/j.issn.1673-193x.2014.10.006]
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不同应力路径下岩石卸荷破坏过程的变形特性与能量耗散分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
10
期数:
2014年10期
页码:
35-40
栏目:
学术论著
出版日期:
2014-10-31

文章信息/Info

Title:
Analysis on deformation properties and energy dissipation of rock unloading failure process under different stress path
作者:
张楚旋12戴兵1吴秋红1
(1中南大学 资源与安全工程学院,湖南 长沙 410083; 2 湖南科大煤矿安全开采技术湖南省重点实验室,湖南 湘潭 411201)
Author(s):
ZHANG Chu-xuan12 DAI Bing1 WU Qiu-hong1
(1.School of Resources and Safety Engineering, Central South University, Changsha Hunan 410083, China; 2. Hunan Province Key Laboratory of Safe Mining Techniques Of Coal Mines, Hunan University of Science and Technology, Xiangtan Hunan 411201 , China)
关键词:
卸围压应力路径变形特性能量耗散应变能
Keywords:
unloading confining pressure stress paths deformation properties energy dissipation strain energy
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2014.10.006
文献标志码:
A
摘要:
基于能量原理和MTS试验机进行了三种不同应力路径下花岗岩卸载试验,研究了卸荷条件下岩石的应力—应变全过程曲线变形特征和岩样卸围压破坏过程的能量耗散规律。研究结果表明,在卸围压过程中,岩样侧向变形明显大于轴向变形,即表现为明显的侧向扩容,且方案3>方案1>方案2;能量耗散与时间呈非线性关系,且在卸围压试验中,施加围压越大,在相同侧向变形水平下能量耗散越大;在同一卸载方式下岩石耗散能随着围压的增大而增大。其研究结果对从能量角度研究卸载岩石力学特性有一定的指导作用。
Abstract:
Through the granite unloading tests under three different stress paths (three schemes), the deformation properties of rock stress-strain curves under unloading conditions and the energy dissipation law in the rock sample destruction process of unloading confining pressure were studied. The results showed that in the process of unloading confining pressure, the lateral deformation of rock samples was significantly greater than the axial deformation, namely appearing as significant lateral expansion, and scheme 3> scheme 1> scheme 2. The energy dissipation and time showed nonlinear relationship, and in unloading confining pressure test, the greater was the applied confining pressure, the greater was the energy dissipation at the same level of lateral deformation. In the same unloaded manner, the rock dissipated energy increased with the increase of confining pressure. From the energy point of view, the findings on researching unloading rock mechanical properties have some guidance.

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备注/Memo

备注/Memo:
煤矿安全开采技术湖南省重点实验室开放基金项目(201203)
更新日期/Last Update: 2014-12-12