| 煤体剪切破坏过程电磁辐射与声发射研究 |
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| 引用本文： | 聂百胜,何学秋,王恩元,窦林名,刘贞堂,撒占友.煤体剪切破坏过程电磁辐射与声发射研究[J].中国矿业大学学报,2002,31(6):609-611. |
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| 作者姓名： | 聂百胜 何学秋 王恩元 窦林名 刘贞堂 撒占友 |
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| 作者单位： | 1. 中国矿业大学,机电工程系,北京,100083
2. 中国矿业大学,能源科学与工程学院,江苏,徐州,221008 |
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| 基金项目： | 国家自然科学基金重点项目 (5 0 13 40 40 )，国家杰出青年基金资助项目 (5 992 5 411)，江苏省自然科学基金资助项目
(BK2 0 0 10 75 ) |
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| 摘 要： | 用剪切实验台和电磁辐射、声发射接收系统对煤体剪切破坏的电磁辐射、声发射特征进行了研究 .结果表明 ,煤体剪切破坏过程中电磁辐射和声发射有两种类型 :一种是在加载初期出现较高的强度 ,加载中间阶段有较为平静的区域 ,主破坏发生前又逐渐增强 ,破坏时出现较高的强度 ,破坏后逐渐减弱 ;另一种是随应力增大电磁辐射和声发射持续增强直至破坏 ,破坏后减小 .试验结果与预测冲击矿压、煤与瓦斯突出等动力灾害的现场测试结果吻合 .
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| 关 键 词： | 煤体 剪切破坏 电磁辐射 声发射 |
| 文章编号： | 1000-1964(2002)06-0609-03 |
| 修稿时间： | 2002年1月17日 |
Study on Electromagnetic Radiation and Acoustic Emission in Shearing Process of Coal |
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| NIE Bai sheng ,HE Xue qiu ,WANG En yuan ,DOU Lin ming ,LIU Zhen tang ,SA Zhan you.Study on Electromagnetic Radiation and Acoustic Emission in Shearing Process of Coal[J].Journal of China University of Mining & Technology,2002,31(6):609-611. |
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| Authors: | NIE Bai sheng HE Xue qiu WANG En yuan DOU Lin ming LIU Zhen tang SA Zhan you |
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| Affiliation: | NIE Bai sheng 1,HE Xue qiu 2,WANG En yuan 2,DOU Lin ming 2,LIU Zhen tang 2,SA Zhan you 2 |
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| Abstract: | Using the shearing experimental equipment and the receiving systems of electromagnetic radiation (EMR) and acoustic emission (AE), the characteristics of EMR and AE during the shear and fracture of coal were investigated. The results show that there are two kinds of EMR and AE in the shearing process of coal. One is that EMR and AE signals increase gradually at the beginning of loading, have a calm zone in the middle stage of loading, enhance gradually before fracture, are very intense at the moment of fracture, and decrease after fracture; the other is that they increase continually with the increase of stress until coal samples fracture and decrease after fracture. These characteristics of EMR agree with the practical observation of forecasting rock burst and coal gas outburst with the EMR method. |
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| Keywords: | coal fracture induced by shearing electromagnetic radiation acoustic emission |
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