深部矿井地震散射波成像数值模拟

Numerical simulation scattered imaging in deep mines

Conventional seismic exploration, mostly based on reflection theory, hardly has accurate imaging results for disaster geologic bodies which have small scale, steep dip, or complex structure. In this paper, we design two typical geologic models for analyzing the characteristics of scattered waves in mines for forward modeling by finite difference and apply the equivalent offset migration (EOM) and EOM-based interference stack migration methods to mine prospecting. We focus on the analysis of scatted imaging’s technological superiority to reflection imaging. Research shows: 1) scattered imaging can improve fold and make the best of weak scattered information, so it shows better results than post-stack migration imaging and 2) it can utilize the diffraction stack migration method-based ray path theory for mine seismic advanced prediction, so it provides an new efficient imaging method for improving resolution of mine seismic exploration.