| 受载煤岩体电磁辐射动态多重分形特征 |
| |
| 引用本文： | 姚精明,董文山,闫永业,郝身展,王路.受载煤岩体电磁辐射动态多重分形特征[J].煤炭学报,2016,41(6):1429-1433. |
| |
| 作者姓名： | 姚精明 董文山 闫永业 郝身展 王路 |
| |
| 作者单位： | 1.重庆大学 煤矿灾害动力学与控制国家重点实验室，重庆 400044；;
2.重庆大学 资源及环境科学学院，重庆 400044 |
| |
| 基金项目： | 中央高校基本科研业务费资助项目(CDJZR13240025) |
| |
| 摘 要： | 采用多重分形理论、物理试验相结合的方法研究了试件单轴压缩破坏过程中电磁辐射信号的多重分形谱宽度ΔDq的变化规律。研究结果表明：试件单轴压缩破坏过程中产生的电磁辐射信号具有多重分形特征；多重分形谱宽度ΔDq与试件所受的应力水平有密切关系。加载初期，分形谱宽度ΔDq随着应力的增加而起伏增强；临近主破裂时，多重分形谱宽度ΔDq达到最大值0.27，进入残余变形阶段后，ΔDq下降至0.20~0.22。因此多重分形谱宽度ΔDq的动态变化与试件受载变形破裂过程具有良好的对应关系，临近主破裂时ΔDq急剧增大且达到最大临界值可以作为试件冲击破坏的判定依据，对试件冲击破坏进行提前预警。
|
| 关 键 词： | 煤体 电磁辐射 多重分形 |
| 收稿时间： | 2015-09-30 |
Multi-fractal characteristics of electromagnetic radiation with loaded coal |
| |
| Abstract: | The EME multi-fractal evolution laws during the deformation and failure processes of coal samples were studied based on fractal theory and laboratory experiment.The results show that the multi-fractal characteristic of EME series is verified.The width of multi-fractal dimension (ΔDq) is closely related to the coal and rock stress，and the width of multi-fractal dimension (ΔDq) usually increases with the increase of coal and rock stress.When coal and rock mainly rupture，it reaches a maximum 0.27，then drops to 0.20~0.22.The characteristic parameters vary with the process of deformation and fracture of coal sample with load.The width of multi-fractal dimension (ΔDq) can be used for evaluating the deformation and failure of loaded coal. |
| |
| Keywords: | coal electromagnetic emission multi-fractal |
|
| 点击此处可从《煤炭学报》浏览原始摘要信息 |
|
点击此处可从《煤炭学报》下载全文 |
