【摘要】 首先对煤岩单轴受压变形破裂过程产生的电磁辐射(EME)、声发射(AE)信号变化规律进行了试验研究,然后在试验测定结果的基础上分析研究了煤岩变形破裂电磁辐射与加载变形能量之间的转换关系。研究结果表明,EME值随着加载时间的增加而增强,声发射信号也呈现同样的规律;电磁辐射的幅值、脉冲数在煤岩主破裂前与应力基本成正相关的关系,出现峰值后降低,试验的各个样品均呈现此变化规律;电磁辐射能和机械能的转化曲线与煤岩单轴加载过程的应力-应变关系曲线是相对应的,且呈现三次多项式的关系。从能量转换的角度来研究煤岩变形破裂电磁辐射与应力之间的关系是可行的。更多还原

【Abstract】 The changing laws of electromagnetic emission(EME) and acoustic emission(AE) during the deformation and failure of the coal or rock sample under uniaxial compression are studied experimentally.Then the energy transformation relation between EME signal and stress fields in the course of deformation and failure of the coal or rock is researched on the basis of experimental testing results.The research results show that: the intensities and pulse of EME and AE will increase with the increasing of loading time or stress and the enhancement of deformation and fracture;the relation between the EME intensity,pulse numbers and the loading stress is positive;the EME value will decrease after the summit value;the changing curve between EME energy and mechanical energy is consistent with the relation curve between stress and strain,which conforms to thrice multinomial approximately;so it is feasible to study the relation between EME and stress during deformation and fracture in view of energy transformation.更多还原