| 煤岩单轴压缩声发射试验分形特征分析 |
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| 引用本文： | 刘京红,姜耀东,祝捷,韩文.煤岩单轴压缩声发射试验分形特征分析[J].北京理工大学学报,2013,33(4):335-338. |
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| 作者姓名： | 刘京红 姜耀东 祝捷 韩文 |
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| 作者单位： | 河北农业大学城乡建设学院,河北,保定 071001;中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083;中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083;中国矿业大学力学与建筑工程学院,北京 100083;河北农业大学城乡建设学院,河北,保定 071001 |
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| 基金项目： | 国家"九七三"计划项目(2010CB226801);河北省教育厅青年基金项目(2011-254);河北省建设科技研究指导性计划(2012-2058) |
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| 摘 要： | 针对有效预测煤岩破裂引起的动力灾害的难题,运用分形理论建立了声发射参数分形维数计算模型,对冲击倾向性煤岩单轴压缩声发射试验信号分形特征进行了研究. 结果表明:随试件的加载进程,声发射能量计盒维数逐步上升,破坏前上升到最高;关联维数降低,试件破坏前下降到最低;Gauss Amp方程能较好地描述煤岩在单轴压缩荷载作用下声发射能量关联维数随荷载的变化规律;可将声发射能量关联维数的持续降低作为煤岩失稳破坏的前兆.
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| 关 键 词： | 冲击倾向性煤岩 声发射 计盒维数 关联维数 |
| 收稿时间： | 2012/11/7 0:00:00 |
Fractal Characteristics of Coal Uniaxial Compression Acoustic Emission Test |
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| LIU Jing-hong,JIANG Yao-dong,ZHU Jie and HAN Wen.Fractal Characteristics of Coal Uniaxial Compression Acoustic Emission Test[J].Journal of Beijing Institute of Technology(Natural Science Edition),2013,33(4):335-338. |
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| Authors: | LIU Jing-hong JIANG Yao-dong ZHU Jie and HAN Wen |
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| Affiliation: | College of Urban and Rural Construction, Agricultural University of Hebei, Baoding, Hebei 071001, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China;School of Mechanics & Civil Engineering, China University of Mining & Technology, Beijing 100083, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China;School of Mechanics & Civil Engineering, China University of Mining & Technology, Beijing 100083, China;College of Urban and Rural Construction, Agricultural University of Hebei, Baoding, Hebei 071001, China |
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| Abstract: | To effectively forecast the dynamic disaster induced by coal rupture, fractal dimension calculation model of acoustic emission (AE) parameters were established using fractal theory. Study on the fractal characteristics of AE test signals generated by uniaxial compressing burst tendency coal were conducted. The results show that the AE energy box dimension gradually raises as the specimen loading process going on, and it reaches to the highest one before destruction, but the relevant dimension cuts down to a minimum before the destruction of the specimen. Gauss Amp equation could be used to describe the variation of AE energy relevant dimension with loading for coal under uniaxial compression loads. The continuous reduction of the AE energy relevant dimension could provide a precursor of instability or failure for coal mine. Results also give useful theoretical guidance for effectively forecasting dynamic disaster caused by coal rupture. |
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| Keywords: | burst tendency coal acoustic emission box dimension relevant dimension |
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