Research On The Surface Buried Mine Earthquake Positioning System

Mine earthquake, a dynamic phenomenon of rock-mass unstable breakage suddenly which is induced by mining, is one of the heaviest natural disasters that affects the safety in the mineral production.As time goes, many mines will go deep-mining, the size and number of mine earthquake will rise further, and it will become increasingly serious disaster.The surface buried mine earthquake monitoring positioning system has been proposed through the occurrence of coal mine earthquake and the study of mine earthquake and its devices.The elaboration of mine earthquake characteristics emphasizes the classification of the coal compressed mine earthquake, the roof fracture mine earthquake and the fault dislocation mine earthquake fit for the classification of coal characteristics, discusses the formation mechanism and instability criteria of the three mine earthquakes, and lays a theoretical foundation for the propose of the surface buried mine earthquake monitoring positioning system.Through the overview of the surface buried mine earthquake positioning system and the discussion of the location and composition of station, studying the surface buried mine earthquake positioning system. By the characteristics of mine earthquake, the surface station siting principles, the densely covered arrangement, the bury installation, the selection of a broadband domain speed sensor, the three-speed sensor design, the development of the bury waterproof data acquisition instrument, the GPS time scale grant, the 3G wireless network transmission, the solar energy power pack supply, the network transmission structure and the WEB design scheme for data processing and analysis.Through the research of the surface buried mine earthquake positioning system and the study of the waveform of mine earthquake and the waveform characteristics of interference signal, describing the identification of the surface buried mine earthquake positioning system and the process of the procedures programming and the programming principles of the part of the procedure, discussing the setting threshold method, the moving average method, the method of fractal theory and the information entropy theory method, and comparing and analyzing of the commonality, characteristic and the advantages and disadvantages of the four methods. Finally, solving the rapid identification of mine earthquake signal by the setting threshold method, solving the accuracy of the beginning to arriving in time by the information entropy theory method, conducting a preliminary analysis of seismic phase, deriving the initial moving direction formula of P wave, and laying a foundation for the origin time and source location of the following mine earthquake.According to the characteristics of mine earthquake location, the system selects single location and multiple location methods, puts forward that the more points of the multi-point positioning method are, the more accurate of the position, densely measuring point is a method to improve the positioning accuracy, but not unlimited densely covered. The statistical analysis shows that the accuracy is improved a little if the reception point is more than 10, the geological structure inhomogeneity, discontinuity and anisotropy make a huge difference and it can not be solved by increasing the measuring points, but calibrate by the blasting location of each area.Through an overview of earthquake magnitude, the discussion of the magnitude characteristics between mine earthquake and earthquake, and the calculation of magnitude comparative example, the fitting duration magnitude formula is more applicable for the calculation of the magnitude of mine earthquake.By exploring the indoor experimentit lays the foundation of previous research for the cobination between research on the surface buried mine earthquake positioning systemand the underground mining areas buried microseismic monitoring positioning system.