应力波作用下岩体结构面对电磁辐射传播的影响

Influence of Rock Mass Structure on Electromagnetic Radiation Propagation Under Stress Wave

为进一步明确岩体结构面对电磁辐射传播的影响,考虑到节理的存在是岩石分层的本因,用麦克斯韦模型对含水节理进行模拟,结合压电方程,获得了节理岩石中电场随节理参数变化的解析解,在此基础上,分别研究了单一介质和复合介质中节理对电场幅值的影响。结果表明:含水节理的存在使得电场幅值降低,电场的能量发生衰减;电场幅值随节理的黏性系数和刚度增大而增大;相对于频率而言,低频时黏性系数对电场幅值的影响更大。对于复合介质,采用固定变量法,电场随单一参数的变化趋势是明确的,但如果考虑实际多项因素组合的复杂性,电场幅值的变化需要按影响因素的权重进行具体分析。

In order to further clarify the influence of rock mass structure on electromagnetic radiation propagation,considering that the existence of joints was the cause of rock stratification,the Maxwell model was used to simulate the water-bearing joints.Combined with the piezoelectric equation,the analytical solution of the electric field in jointed rock varying with joint parameters was obtained.On this basis,the influence of joints on the electric field amplitude in single medium and composite medium was studied respectively.The results show that the existence of water-bearing joints reduces the amplitude of electric field and the energy of the electric field decays.The electric field amplitude increases with the increase of the viscosity coefficient and stiffness of the joint.Compared with the frequency,the viscosity coefficient has a greater influence on the electric field amplitude at low frequency.For the composite medium,the change trend of the electric field with a single parameter was clear by using the fixed variable method.But if considering the complexity of the actual combination of multiple factors,the change of the electric field amplitude needs to be analyzed according to the weight of the influencing factors.