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[1]曾晟,江博为,邓显石,等.层状节理岩体模型冲击实验[J].中国安全生产科学技术,2016,12(1):176-180.[doi:10.11731/j.issn.1673-193x.2016.01.033]
　ZENG Sheng,JIANG Bowei,DENG Xianshi,et al.Impact tests on model of layered and jointed rock mass[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(1):176-180.[doi:10.11731/j.issn.1673-193x.2016.01.033]
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层状节理岩体模型冲击实验
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
12
期数:
2016年1期
页码:
176-180
栏目:
现代职业安全卫生管理与技术
出版日期:
2016-01-30

文章信息/Info

Title:
Impact tests on model of layered and jointed rock mass
文章编号:
1673-193X（2016）-01-0176-05
作者:
曾晟1; 江博为1; 邓显石2; 孙冰2; 谭均2
(1．南华大学 核资源工程学院，湖南 衡阳 421001；2．南华大学 城市建设学院，湖南 衡阳 421001)
Author(s):
ZENG Sheng1;  JIANG Bowei1;  DENG Xianshi2;  SUN Bing2;  TAN Jun2
(1. School of Nuclear Resources, University of South China, Hengyang Hunan 421001, China; 2. School of Urban Construction, University of South China, Hengyang Hunan 421001, China)
关键词:
岩石动力学; 模型实验; 冲击荷载; 层状节理
Keywords:
rock dynamics;  model test;  impact load;  layered and jointed
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2016.01.033
文献标志码:
A
摘要:
为研究层状节理岩体在冲击荷载作用下的力学特性，实验采用水泥砂浆预制层状节理岩体模型，设计4个落锤高度对不同节理组数的岩体进行冲击加载。通过对冲击过程中载荷及加速时程信号的分析处理，得出节理岩体动态承载力与节理组数呈负相关性，压缩位移与冲击高度呈正相关性；当冲击荷载较小时，节理岩体动态压缩位移主要来自节理法向闭合，节理周边开始产生细微裂缝；随着冲击荷载的逐渐增大，裂缝逐渐沿节理面扩展贯通导致岩体破坏。
Abstract:
In order to study the mechanical properties of layered and jointed rock mass under impact loading, the model of layered and jointed rock mass was prefabricated by cement mortar in the tests, and four heights of drop hammer were designed to carry out impact loading on rock mass with different numbers of joint groups. Through the analysis and treatment of load and accelerating time history signals in impact process, it showed that the dynamic bearing capacity of jointed rock mass is negatively correlated with the number of joint groups, while there is a positive correlation between the compression displacement and the impact height. When the impact load is small, the dynamic compressive displacement of jointed rock mass is mainly derived from the joint normal closure, and minor cracks begin to appear around the joint. With the impact load gradually increases, the cracks gradually expand along the joint surface and lead to the failure of rock mass.

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备注/Memo

备注/Memo:
国家自然科学基金项目（51204098）；湖南省科技厅重点研发计划项目（2015SK2058-4）；国家级大学生创新创业训练计划项目（20140555004）；南华大学大学生创新训练实验项目（2014021）
更新日期/Last Update: 2016-03-01