The Method of Fracture Research Based on Seismic Refraction

Stan-Kleczek, I. (University of Silesia) | Idziak, A.F. (University of Silesia)

OnePetro 

Abstract The seismic refraction method applies to a very wide range of scientific and technical problems. The present research were done for sedimentary rocks (sandstone, limestone) and igneous rock (diabase) localized in southern Poland. It was measured seismic waves velocity in the surface layers of rock mass and the strike azimuth and dip angle of cracks. Obtained data allowed us to calculate two–dimensional crack tensors and velocity tensors in planes parallel to the layer surface. The application of tensor calculus enable to take into account both geometry and orientation of cracks. The obtained results confirm that the directions of major axes of second rank velocity tensor prove the relationship consistent with predictions of theoretical models. Thanks to these dependences we can use seismic methods to study the cracks anisotropy in rocks inaccessible for direct observations.

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