单轴循环加载煤岩电磁辐射规律实验研究  

Experimental Study on Coal Rock Electromagnetic Radiation Laws Under Uniaxial Cyclic Loading

作　　者：金佩剑[1,2] 王恩元[1,2] 宋大钊[1,2] 黄宁[3] 王嗣衡[1,2] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221008 [3]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《煤矿安全》2013年第5期46-48,共3页Safety in Coal Mines

基　　金："十二五"国家科技支撑计划资助项目(2012BAK09B01);国家自然科学基金资助项目(50904067;51104156);煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM09X01)

摘　　要：研究了循环加载条件下煤岩受载破坏过程的电磁辐射变化特征规律,并分析了其产生的机理。研究结果表明:煤岩单轴循环加载过程中,电磁辐射信号参量变化随着循环载荷的增加基本上呈线性增大;在加卸载过程中,电磁辐射信号参量随着加载载荷的增大而增大大,且随着卸载的进行而逐渐变小,产生此现象的原因是煤岩受载破坏过程中微裂纹的演化及煤岩基质之间的相互摩擦作用。The characteristic laws of electromagnetic radiation variation for coal rock during its loaded failure process under cyclic loading conditions are studied in this paper, and the its mechanism is analyzed too. The results show that the parameters change of coal rock electromagnetic radiation signal substantially increases linearly with increasing cyclic loading during uniaxial cyclic loading; the electromagnetic radiation signal parameters increases as the load increases and becomes gradually smaller in the unloading process, the reason for this phenomenon is the evolution of microcracks and the mutual friction in coal matrix during coal rock loading process.

关 键 词：循环加载 电磁辐射 脉冲 能量 煤岩动力灾害 煤岩破坏 

分 类 号：TD326[矿业工程—矿井建设]