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

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.