IMPROVING THE VIBROACOUSTIC METHOD FOR CONTROL OF DAMAGE TO GEOTECHNICAL STRUCTURES

Problem statement. The vibroacoustic monitoring method requires further improvement, especially in establishing clear links between the measured diagnostic parameters and characteristic defects of the environment structure. It is necessary to integrate data and develop risk indicators of the geotechnical system stability loss for automatic recognition of defects, taking into account the use of the vibroacoustic method. Purpose of the study. Improvement of the vibroacoustic method for structures destruction control and search of the cracks localization in mine workings, underground and deep structures of various purposes. Methods. Analysis and generalization of experimental data of vibroacoustic diagnostics, analytical methods of classical wave theory. Research results. The following are considered: prerequisites and main parameters of the vibroacoustic method of monitoring geotechnical structures; features of using the vibroacoustic monitoring technique to assess the damage of elements of a geotechnical system; methods for interpreting the results of vibroacoustic diagnostics; assessment of the stability loss risks of geotechnical structures using the vibroacoustic method. To determine cracks and damage in mine workings, underground and deep structures of various purposes, the relationships between the main parameters of vibroacoustic diagnostics (amplitude, duration and frequency of the signal maximum spectral density) with characteristic defects and damage to elements of the geotechnical system have been established and systematized. The method for assessing changes in the structure of the environment and the loss of hazardous objects stability as a result of the occurrence of crack systems during their operation has been improved and expanded. Current and complex indicators of the geotechnical system loss stability risk have been determined based on the results of the external and hidden structural damage detection using visual and vibroacoustic diagnostics. This allows monitoring structural damage and a number of other critical parameters that affect the safety of the structures operation, assessing of the geotechnical system stability loss risks and carrying out repair work in a timely manner. Scientific novelty. The method of the structures destruction vibroacoustic control was further developed, which is distinguished by taking into account the relationships between diagnostic parameters and characteristic defects in the structure of the environment, as well as indicators of the geotechnical system stability loss risks. Practical significance. Recommendations for using the vibroacoustic method for cracks searching in workings and structures have been developed and implemented.