Год издания: 2017

The paper presents a seismic data interpretation approach to reconstruction of stress fields in rocks at any stage of coalmining. The approach involves: thee-axial compression testing of coal in order to find an empirical relation between elastic wavevelocity and stresses; coal bed tomography using standard monitoring systems and taking signals generated by dynamic events(with the energy higher than the background level) as the probing signals; formulation and solving of a boundary inverse problemwithin a geomechanical model of an object under analysis where the input data is the velocity field reconstructed in theilluminated area of coal bed by tomography.The data of the laboratory tests of coal specimens by the von Karman scheme have been approximated to plot analyticalrelationships between P-waves, axial stress and confining pressure.The numerical experiments performed for a typical underground layout of shear mining at Vorkutaugol company have shownthat given the accepted array of seismic pickups, the single-valued solution of the inverse problem requires good illumination ofcoal bed areas with the spatial stress gradient.