预制裂纹煤系岩石破坏的电磁辐射规律研究  

Study on Electromagnetic Radiation Laws from Coal Measures Rock with Precrack During Its Failure

作　　者：宋晓艳[1] 李忠辉[2] 

机构地区：[1]中国矿业大学应用技术学院,江苏徐州221008 [2]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《煤矿安全》2015年第10期56-59,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51174200);全国博士学位论文作者专项资金资助项目(201055);江苏省333高层次人才培养工程资助项目((2011)Ⅲ-2002)

摘　　要：实验研究了含预制裂纹煤系岩石单轴压缩破坏的电磁辐射规律及其响应机制。结果表明,预制裂纹的存在降低了岩石破坏电磁辐射信号的强度及脉冲数,相较于45°裂纹岩样,预制30°裂纹岩样破坏的电磁辐射强度更低;含预制裂纹岩样破坏的电磁辐射信号具有波动性和阶段性;预制裂纹倾角不同时,煤系岩石受载破坏电磁辐射信号的主导机制也不相同。We carry on experimental study about law and mechanisms of electromagnetic radiation（ EMR） from coal measures rock with precrack during its failure under uniaxial compression in the article. The results show that the presence of precrack in rock samples reduce the intensity and the pulse number of EMR signals; the intensity of EMR from the rock sample with 30° prepared crack during its failure is lower than that of 45° prepared crack; EMR signals from rock samples with precrack during their failure has wave and phase properties; the principal mechanisms of EMR generation during loaded coal measures rock failure are also different for different inclinations of precrack.

关 键 词：煤系岩石 预制裂纹 单轴压缩 电磁辐射 顶板管理 

分 类 号：TD713[矿业工程—矿井通风与安全]