Three-Dimensional Seismic Exploration Technology For Thin Coal Seam

Previous three-dimensional seismic exploration finding that the amplitude of the thin coal seam become weak, and its amplitude and phase rapid change in the horizontal by the shielding effect of the overlying thick coal seam which making the solutions of structural interpretation of thin seam of coal serious multiple. To solve the problem, this article takes zliangji coal in Huainan for example and made high accuracy geological results with the research of staggered-grid finite difference simulation and high density seismic exploration. The results show that, multiple waves processed by the bedrock interface and the surface reach the detector almost at the same time with reflected wave of the coal 11-2 and cause its reflection amplitude larger change. Shielding effect of coal 13-1 made the reflected wave of coal 11-2 weak energy. By the method of high density seismic exploration to fine exploration geological structure in the mining area to further improve the accuracy of the seismic exploration and with exemplary, authentication in northeast of zhangji coal is high reliability induct that the fault in coal 11-2 that drop above 3 meters coincide with mining results.