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On the Possibilities of CMPCC Analysis of Surface Waves to Detect Lateral Heterogeneity and Zones of Subvertical Fracture in Soils
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Engineering and Mining Geophysics 2020, Sep 2020, Volume 2020, p.1 - 11
Abstract
Examples of the practical use of the cross-correlation analysis of surface waves at a common midpoint (CMPCC) are considered. To calculate the attenuation parameter of the energy of surface waves, we use the averaged ratios of the spectra of seismic traces recorded in pairs of receiving points equidistant from the midpoint (CMP). As the initial data, the records obtained during shallow and engineering seismic exploration by reflected waves with multiple overlapping (CDP) are used. At the example of the Upper-Kama potash salt deposit, methods for a joint interpretation of the CMPCC analysis with the results of shallow on-land seismic exploration and non-longitudinal vertical seismic-acoustic profiling (VSP) in geotechnical wells are being considered to identify sharp lateral inhomogeneities and zones of subvertical fracture of the rock mass in potentially dangerous sections of subsidence of the earth's surface and suprasalt strata collapses within the worked out mine fields