| Microseismic monitoring technology is a use of geophysical methods of mining coal and rock power disaster warning forecasting new technologies,although the process is still in its infancy, but the method is considered to be one of the most effective monitoring of disasters and accidents in coal or rock dynamic,but In China, the use of microseismic method of coal and rock power disaster forecasting is still in the research phase. Since some domestic scholars microseismic monitoring technology introduced from abroad, the current majority is still mainly used in metal mines, and most just borrow conventional seismic monitoring techniques and tools. Multivariate time series can mine ore earthquake shock system is more complete than the single time series contains more extensive information, so explore multivariate phase space reconstruction for the mine and the risk characteristics of earthquake prediction has become a new field of chaotic dynamics subject. Through research on this subject is expected to use multivariate time series mine quake system phase space reconstruction, thereby enhancing the complete remodeling of the mine power system vibrations, and then force the system to extract ore vibration characteristic parameters by multivariate Mine earthquake time series feature information obtained better performance characteristics of mine quake system, thereby providing a more effective means of mine earthquake risk prediction. Based on this, a study about the mine earthquake monitoring system based on distributed source technology to quickly locate key approach.First, the present situation of microseismic monitoring system were analyzed to identify the shortcomings of existing microseismic monitoring systems exist.And thus a distributed source microseismic monitoring system, the design ideas and process design of the sensor and distributed information processing system,and on this basis, proposes an improved hybrid GA- Quasi-Newton algorithm to enhance the source of positioning speed. Through simulation and experiments, to verify the effectiveness of the algorithm, the improved algorithm while maintaining the same conditions as positioning accuracy, speed can increase 6.3 times;Secondly, in the present situation at home and abroad on the basis of the analysis of chaotic time series features a microseismic analysis and risk predictionmethods were studied. We proposed a theory based on the multi-dimensional phase space reconstruction mine tremor signal time series multi-dimensional phase space reconstruction methods, and apply the maximum Lyapunov index and generalized correlation dimension method to mine tremor time series a fundamental determination, multivariate Phase space reconstruction of information can be more comprehensive feature that contains information of shock, increasing the robustness of mine tremor characteristic information, to improve the analysis and judgment of risk diagnosis rate, which for the study of chaos theory in the field of mine mine earthquake and applications to provide a reference value.Finally, in order to solve the microseismic sensor nodes limited energy supply difficult issues, proposed and designed an improved four coil power transfer model based on the principle of resonant coupling, simulation and experimental results show that the designed circuit can meet the 40cm-60 cm energy transmission, the maximum transmission power of up to 5w, transmission efficiency up to 75%.In summary, the development of science, advanced microseismic positioning monitoring system, based on research quickly locate the source Method distributed mine earthquake monitoring system key technology, mining of coal and rock dynamic disasters continuous real-time monitoring, to accurately predict the risk of shock ore grades, It can provide accurate and timely information for decision making for the mine workers, thereby reducing lost production, coal mine to bring huge economic benefits, has important theoretical significance, but also a very good value. |
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