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[1]张民波,雷克江,吝曼卿,等.加轴压卸围压下含瓦斯煤岩损伤变形的能量演化机制[J].中国安全生产科学技术,2018,14(4):45-50.[doi:10.11731/j.issn.1673-193x.2018.04.007]
　ZHANG Minbo,LEI Kejiang,LIN Manqing,et al.Energy evolution mechanism for damage deformation of gas-containing coal rock under loading axial pressure and unloading confining pressure[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(4):45-50.[doi:10.11731/j.issn.1673-193x.2018.04.007]
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加轴压卸围压下含瓦斯煤岩损伤变形的能量演化机制
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年4期
页码:
45-50
栏目:
学术论著
出版日期:
2018-04-30

文章信息/Info

Title:
Energy evolution mechanism for damage deformation of gas-containing coal rock under loading axial pressure and unloading confining pressure
文章编号:
1673-193X(2018)-04-0045-06
作者:
张民波1; 2; 雷克江1; 吝曼卿1; 赵洋1; 王龙康3
（1.武汉工程大学 兴发矿业学院，湖北 武汉 430205；2.中国矿业大学 （北京）资源与安全工程学院，北京 100083；3.中国电子信息产业发展研究院，北京 100846）
Author(s):
ZHANG Minbo1; 2; LEI Kejiang1; LIN Manqing1; ZHAO Yang1; WANG Longkang3
(1.School of Xingfa Mines,Wuhan Institute of Technology,Wuhan Hubei 430205,China;2.School of Resource and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;3.China Center for Information Industry Development,Beijing 100846,China)
关键词:
加卸载; 围压; 损伤变形; 能量耗散; 渗透率
Keywords:
loading and unloading;  confining pressure;  damage deformation;  energy dissipation;  permeability
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2018.04.007
文献标志码:
A
摘要:
采动影响下含瓦斯煤岩的损伤变形是一个极其复杂的非线性过程，单纯依靠传统经典弹塑性力学无法准确分析其破坏机理。针对此情况，通过试验研究了不同初始围压条件下含瓦斯煤岩的损伤变形特征，并分析了损伤变形与能量演化规律之间的内在联系。研究表明：初始围压越高，煤样破坏时强度越大，脆性破坏特征越明显，瓦斯流量急剧增加幅度越大，煤样破坏时积累的总能量和弹性应变能越多，且初始围压与弹性能之间满足对数函数关系。采用累积耗散能定义了煤岩损伤变量，并分析了不同阶段损伤与渗透率之间的演化关系。
Abstract:
The damage deformation of gas-containing coal rock under the influence of mining is an extremely complex nonlinear process,and it is impossible to accurately analyze the failure mechanism by simply relying on the traditional classical elastic-plastic mechanics. Aiming at this situation,the damage deformation characteristics of gas-containing coal rock under different initial confining pressures were studied by the experiments,and the internal relationship between the damage deformation and the energy evolution laws was analyzed. The results showed that the higher the initial confining pressure,the greater the strength of coal sample failure,the more obvious the brittle failure characteristics,the greater the sharply increase amplitude of gas flow,the more the accumulated total energy and elastic strain energy,and there was a logarithmic function relationship between the initial confining pressure and the elastic energy. The cumulative dissipation energy was used to define the damage variable of coal rock,and the evolutionary relationship between the damage and permeability at different phases was analyzed.

参考文献/References:

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备注/Memo

备注/Memo:
国家自然科学基金青年基金项目（51504167）；湖北省教育厅科学技术研究计划青年人才项目(Q20171508)；武汉工程大学科学研究基金项目（k201617）
更新日期/Last Update: 2018-05-08