煤岩非线性损伤试验及理论模型  

Experimental and theoretical study on nonlinear damage model of coal and rock

作　　者：杨小彬[1] 丁元伟[1] 秦跃平[1] 宋宜猛[1] 郑元锟[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《辽宁工程技术大学学报（自然科学版）》2009年第6期884-887,共4页Journal of Liaoning Technical University (Natural Science)

基　　金："973"计划基金资助项目(2005CB221502);国家自然科学基金资助项目(50674091);博士后科学基金资助项目(2008440445);国家青年基金资助项目(50904071)

摘　　要：为了研究煤岩材料的损伤演化过程,分别对煤和砂岩试样进行了轴向应变控制、定常环向应变控制、不同围压下的单轴压缩和三轴压缩试验研究,观察煤岩的实验损伤演化过程;对试验数据进行分析,结合煤样的变形损伤特征,基于损伤力学和热力学基本原理,推导并建立了煤岩非线性损伤演化方程和煤岩试样非线性损伤本构方程。通过试验结果验证了煤岩材料的非线性损伤理论的合理性,同时也丰富了煤岩损伤理论体系。In order to investigation into the damage evolution process of coal and rock,in this paper,we did a lot of uniaxial and triaxial compression experiments of coal and sandstone in different kinds of conditions such as axial strain control、steady hoop strain control and under different confining pressures.And observed coal and rock damage evolution process,the test data were analyzed.Based on the basic principle of damage mechanics and thermodynamics,the nonlinear damage constitutive equation and nonlinear damage evolution equation of coal and rock were established.Compared the experimental results with the theoretical results,the nonlinear damage results showed that the test curve accordance with theory,and the results will enrich the theoretical frame of the coal and rock damage theory.

关 键 词：煤岩 损伤 本构方程 非线性 

分 类 号：TD313[矿业工程—矿井建设]