北京科技大学学报2011，Vol.33Issue(6)：653-657,5.
煤岩强度及变形特征的微细观损伤机理
Micro and meso-damage mechanism of coal's strength and deformation characteristics
摘要
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 seam in Baodian Colliery and No. 3 coal seam in Xuchang Colliery, which both belong to carboniferous-permian Yanzhou Coalfield, decrease by 68.5％ and 50.6％ compared with No.3 coal seam in Xinhe Colliery, the uniaxial compressive strengths increase by 224.8％ and 109.9％, and the elastic moduli increase by 147.3％ and 66.9％ , respectively. With decreasing damage variable, the uniaxial compression failure gradually changes from plastic to brittle. Macroscopic mechanical properties of the coal rocks are closely related to micro and meso-damage.关键词
岩石力学/煤/材料强度/变形/损伤机理Key words
rock mechanics/ coal/ strength of materials/ deformation/ damage mechanism分类
天文与地球科学引用本文复制引用
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):653-657,5.基金项目
国家重点基础研究发展计划资助项目(No.2010CB226805) （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) （No.SKLGDUE08002X）
山东省"泰山学者"建设工程专项经费资助项目 （）
