The results of theoretical and experimental studies have established the need to improve and modernize the highly sensitive piezoelectric resonant type PeA12 converters used in the seismic monitoring system, which have been successfully used for more than 30 years in the rock mass at a number of rockburst hazardous mines. The main problem of the accuracy measurement by the geophone PeA12 (and other models based on it) is due to the presence of several resonances in the operating frequency band. The developed upgraded model of the AP2088 converter has successfully passed industrial testing as part of the automated monitoring system “Prognoz-ADS” at rockburst hazardous mine. During the test period (more than 1 year), seismoacoustic events were registered and verified in the rock mass, including rock burst and shocks in the rock mass. Thus, the use of highly sensitive (u10 V/m•s-2) piezoacoustic converters AP2088 as part of the automated system provides registration of acoustic emission in the rock mass in the frequency range from 0.1 to 10 kHz with the energy of seismic events from 10 to 106 J, which will increase the reliability of the forecast of geodynamic phenomena and technogenic seismicity in the control zone of the system.
Using the joint analysis of seismoacoustic monitoring data and geodynamic features we have determined the consistent patterns of industrial stress field formation in deep aquifers of Nikolayevsky polymetallic deposit. This analysis allowed us to explain the hypothesis about the mechanism of hazardous geodynamic phenomena in the complex structure rock mass. Results of the research on the geostructural features of the Nikolayevsky scarn-polymetallic deposit allowed us to improve its geodynamic zoning. As the result, we have discovered major heterogeneity of the geological environment of the ore field, which defines its modern structure, as well as features of the strain-stress state of the rock mass (olistolith).
The principles of complexed geodynamic monitoring on the basis of long-term experience and research results of natural and man-made processes in the uranium deposits of the Streltsovsky ore province are proposed. The principles are to use simultaneously regular satellite, geodetical, seismical, geophysical, geological, and a number of other observations aimed at studying the upper part of the earth's crust. In the world’s mining practice, such large-scale integrated studies, where within the boundaries of one territory (a group of deposits or ore provinces) a similar set of observations aimed at monitoring geodynamic processes in the upper part of the earth's crust has not been found. The development of monitoring methods at the “Geodynamic polygon of the Streltsovsky ore field” and the additional placement of new multi-level monitoring systems will provide more information about the state of the rock mass in the upper part of the earth's crust, increase the reliability in prediction of dangerous geodynamic manifestations, identify their precursors and reduce the risk of man-made disasters. It is planned to create a common centre for processing and analysis of multiparameter data on geodynamic processes in the depth of the rock mass and local geomechanical processes near underground mine workings.
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