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把岩石抽象为Kelvin-Voigt黏弹性体,应用复数理论建立了应力波在岩石中传播时的振动频率和波动频率的关系,在此基础上,研究了岩石和含有一组平行结构面的岩体中应力波幅值随时间和随空间衰减的关系。研究表明,应力波在岩石的传播过程中,频率是影响应力波幅值衰减的的主要因素;应力波在含有1组平行结构面岩体的传播过程中,由于结构面的存在,影响了应力波能量的传播,其幅值随时空衰减系数主要由结构面间距及其反射系数决定,结构面间距减小和反射系数增加,幅值随传播距离的衰减系数增加和随时间的衰减系数减小,而结构面的黏性系数增加,幅值随传播距离的衰减系数增加,但随时间的衰减系数变化很小。上述结论对岩体结构探测具有重要的指导意义。
The rock is abstracted as Kelvin-Voigt viscoelastic body. The relationship between the vibration frequency and the wave frequency of stress waves propagating in rock is established by using complex theory. On the basis of this, the relationship between rock and rock mass containing a set of parallel structural planes Stress wave amplitude with time and the relationship with space attenuation. The results show that the frequency is the main factor that affects the attenuation of stress wave amplitude in the process of rock propagation. The stress wave affects the stress in the process of propagation with a group of parallelepiped rock mass due to the existence of structural plane The propagation of wave energy, the amplitude attenuation with time and space, is mainly determined by the distance between structural planes and its reflection coefficient. The spacing between structural planes decreases and the reflection coefficient increases. The attenuation coefficient of amplitude with propagation distance decreases and the attenuation coefficient decreases with time , While the viscous coefficient of the structural plane increases and the attenuation coefficient of the amplitude increases with the propagation distance, but the attenuation coefficient changes little with time. These conclusions have important guiding significance for rock structure detection.