基于力电耦合冲击矿压电磁辐射预测法的研究

笔者首先提出了煤岩变形破裂过程电磁辐射与应力耦合的概念 ,然后在实验研究、理论分析和数值模拟的基础上从力电耦合的角度研究了煤岩冲击矿压预测的电磁辐射法 (EME)。研究结果表明 :FLAC3D方法能对矿山巷道掘进过程煤岩内部应力场进行有效的数值模拟 ;电磁辐射信号主要来源于应力集中区 ,在场点监测到的电磁辐射信号主要是应力集中区煤岩变形破裂过程产生的 ;EME信号呈现出与煤岩内部应力变化相同的规律 ;利用力电耦合方法研究煤岩冲击矿压电磁辐射预测法是可行的。笔者最后还对未来煤岩冲击矿压电磁辐射预测法的研究进行了展望。

Study on Prediction of Rock or Coal Outburst by EME Method Based on Coupling EME with Stress

The concept of coupling EME with stress during the deformation and fracture of rock or coal was put forward. Based on laboratory experiments, theoretical analysis and numerical simulation, the EME method for prediction of rock or coal outburst in light of coupling EME with stress was studied. The results showed that the FLAC3D method could effectively simulate the stress field of coal or rock during the course of tunneling. Most EME signals came from the stress concentrated area, which were produced in the course of deformation and fracture of coal or rock. EME signals showed the same changing rule as the stress. It is feasible to study the EME method for predicting rock or coal outburst by means of coupling EME with stress. Prospective for further study on EME method for predicting rock or coal outburst was presented.