| 煤岩强度及变形特征的微细观损伤机理 |
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| 引用本文： | 杨永杰,王德超,王凯,黄冬梅.煤岩强度及变形特征的微细观损伤机理[J].北京科技大学学报,2011,33(6):653-657. |
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| 作者姓名： | 杨永杰 王德超 王凯 黄冬梅 |
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| 作者单位： | 1. 山东科技大学矿山灾害预防控制国家重点实验室,青岛266510;中国矿业大学深部岩土力学与地下工程国家重点实验室,徐州221008
2. 山东科技大学矿山灾害预防控制国家重点实验室,青岛,266510 |
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| 基金项目： | 国家重点基础研究发展计划资助项目(No.2010CB226805); 深部岩土力学与地下工程国家重点实验室开放基金资助项目(No.SKLGDUE08002X); 山东省“泰山学者”建设工程专项经费资助项目 |
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| 摘 要： | 利用MTS815.03电液伺服岩石力学试验系统和S250Mk3扫描电镜对三种煤岩性能及形貌进行分析观察,采用损伤力学分析方法对煤岩强度和变形特征的微细观机理进行了研究.结果表明,煤岩微细观损伤变量对其宏观力学参数影响很大,同为石炭二叠系兖州煤田的鲍店矿3煤和许厂矿3煤的原生损伤变量分别比新河矿3煤减少68·5%和50·6%,其单轴抗压强度分别增加224·8%和109·9%,弹性模量分别增加147·3%和66·9%.同时,随损伤变量减小,煤的单轴压缩破坏逐渐由塑性向脆性转变.煤岩宏观力学性质与其微细观损伤密切相关.
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| 关 键 词： | 岩石力学 煤 材料强度 变形 损伤机理 |
Micro and meso-damage mechanism of coal's strength and deformation characteristics |
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| YANG Yong-jie,WANG De-chao,WANG Ka,HUANG Dong-mei.Micro and meso-damage mechanism of coal's strength and deformation characteristics[J].Journal of University of Science and Technology Beijing,2011,33(6):653-657. |
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| Authors: | YANG Yong-jie WANG De-chao WANG Ka HUANG Dong-mei |
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| Institution: | YANG Yong-jie1,2) Wingdingsj,WANG De-chao1,2),WANG Kai1),HUANG Dong-mei1)1) State Key Laboratory of Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266510,China2) State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221008,China |
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| Abstract: | The properties and morphological structures of three types of coal rocks were experimentally analyzed with MTS815.03 servo-control rock mechanical test system and S250Mk3 scanning electronic microscope.The micro and meso-damage mechanisms of the coal's strength and deformation characteristics were studied with using the theory of damage mechanics.It is shown that the micro and meso-damage variable has great influence on the coal's macroscopic mechanical parameters.The original damage variables of No.3 coal ... |
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| Keywords: | rock mechanics coal strength of materials deformation damage mechanism |
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