Abstract
The increased intensity of dynamic disasters due to overlying burden in deep mining has become a global issue. Understanding the spatial characteristics and governing principles of seismic waves propagation resulted due to dynamic load hold imperative meaning, however, it remained challenging. In this paper, the characteristics of fracture source and spatiotemporal response law of seismic wave generated by rock fracture are studied through uniaxial loading, high-resolution X-ray scanning and 3D visual reconstruction technology. The obtained results show that with the increase in stress, the peak amplitude of seismic wave signal exponentially increases whereas the dominant frequency decreases. The characteristic parameter of the seismic wave displays a linear functional relationship with fracture source. The amplitude and energy of seismic wave signal are linearly related to fracture size, while the dominant frequency linearly decreases. The spatial distribution of seismic amplitude and frequency possess prominent directivity. The spatial seismic characteristics are fundamentally consistent with the theoretical field radiation model of seismic wave displacement. The research results further elucidate the spatial propagation characteristics of seismic wave which would be helpful in understanding the dynamics of disturbances caused in worldwide deep mining.
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