煤岩体破坏过程中电磁辐射与能量耗散耦合分析  

Application of coupling between EME and energy dissipation during deformation and fracture of coal-rock mass

作　　者：姚精明[1,2] 税国洪[2] 王熙[2] 

机构地区：[1]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400044 [2]重庆大学资源及环境科学学院,重庆400030

出　　处：《辽宁工程技术大学学报（自然科学版）》2009年第3期345-348,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50074030);国家自然科学重大基金资助项目(50490270)

摘　　要：为了完善电磁辐射方法预测预报煤岩体动力灾害理论,利用物理实验、理论分析的方法研究受载煤岩体变形破裂过程中产生电磁辐射信号特征及其与煤岩体能量耗散的耦合关系。结果表明:电磁辐射是煤岩体塑性变形引起的,受载煤岩体电磁辐射脉冲数与塑性能变化率成正比,比例系数为5.962,电磁辐射总脉冲数与煤岩体的塑性能成正比,电磁辐射不仅仅与损伤速率有关,而且还与受载煤样的弹性模量成正比,这与受载煤岩体电磁辐射试验现象相符合。To consummate the forecast theory of coal-rock mass dynamic disaster based on electromagnetic emission （EME） method, the coupling relations between EME Signal and energy dissipation of coal-rock mass during the deformation of coal-rock mass are investigated using physical experiments and theoretical analysis. The results show that EME is caused by the plastic deformation of coal-rock mass. The pulse number of EME is proportional to the rate of plastic energy change, and the ratio is 5.962. In addition, the total pulse number of EME is proportional to plastic energy. EME is not only related with damage rate, but also proportional to plastic module of coal samples, which is corresponding to experimental phenomena.

关 键 词：电磁辐射 能量耗散 塑性能变化率 脉充数 

分 类 号：TD324[矿业工程—矿井建设]