Rock Fracture Monitoring Based on High-Precision Microseismic Event Location Using 3D Multiscale Waveform Inversion

Figure 3

Illustration of wavefield propagation using SEM modeling and the corresponding complex inhomogeneous velocity model. The background is a 2D slice view of the 3D tomographic velocity model. The cyan triangles denote the vertical projection of monitoring sensors onto an inclined 2D plane, and the black star represents a selected event location for an illustrative synthetic example. The time interval of wavefront evolution is set to 0.04 s. The wavefield amplitude is normalized by the maximum amplitude of full space wavefields, so as to display evident attenuation, focusing and defocusing characteristics of a wavefield propagating in complicated mine regions.