基于SPH的煤岩单轴加载声发射数值模拟  

Numerical simulation of coal uniaxial loading acoustic emission based on SPH

作　　者：孙超群[1,2,3] 程国强[2] 李术才[1] 李利平[1,3] 许振浩[1] 郭明[1] 林鹏[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]山东科技大学矿山灾害预防控制实验室,山东青岛266590 [3]国土资源部煤炭资源勘查与综合利用重点实验室,陕西西安710054

出　　处：《煤炭学报》2014年第11期2183-2189,共7页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2013CB036000);国土资源部煤炭资源勘查与综合利用重点实验室开放课题资助项目(KF2013-5);山东大学基本科研业务费专项资金资助项目(2014GN028)

摘　　要：基于SPH(光滑粒子流体动力学)数值计算方法,研究了非均质煤岩材料的单轴压缩试验声发射效应,揭示了煤岩的声发射效应随着均质度m的变化规律。研究表明:随着均质度m值的增大,试件的声发射效应由群震型逐渐变为前震—主震—余震型、主震型;试件积聚能量的能力逐渐增强,材料属性由理想弹塑性材料向极端脆性材料转变,破坏模式由塑性流动破坏逐渐变为脆性破坏,其破坏形式越来越剧烈。The SPH（ Smoothed Particle Hydrodynamics） method was applied to study the acoustic emission effect in uniaxial compression test of coal with different homogeneous degree m. The change law of acoustic emission effect with the homogeneous degree was obtained. With the increasing of the homogeneous degree,the AE effect modes changes gradually from the swarm shocks to the pre-main-after shocks,and then to the main shocks. The ability of accumulation energy gradually increases with the homogeneous degree. The material properties of specimens changes from the ideal elastic-plastic material to the extreme brittle material. The mode of coal specimens＇ failure changes from the plastic flow failure to the brittle failure. The impact failure of specimens increases with the homogeneous degree.

关 键 词：SPH 声发射 均质度 单轴加载 

分 类 号：TD315[矿业工程—矿井建设]