The Research Of Mine Tremor Based On Wavelet Analysis And Grey System Theory

Mine tremor is a kind of earthquakes, which occurs in the mine area and is influenced by the mining scale and the mining way. The mine tremor which is very harmful for people's lives safety under the mine, the recycling of resources and mine production equipments, takes great loss to the country and the people. In order to reduce the loss caused by mine tremor in maximum and carry on the disaster's forecasting and appraisal and so on, it is urgently to research the forming mechanism, the characteristic of mine tremor and so on.Based on the material mine tremor data, this article has researched on the mine tremor from the aspects of decreasing noise of the wave, the earthquake center localization, the relationship between mine tremor and mining, and prediction of the extreme data of mine tremor and so on. In the mine tremor analysis with wavelet technology, this article studies the application of the wavelet threshold value to de-noising in the mine tremor wave, and analyzes the characteristic of this method; decompose mines tremor quantity and mining to multi-scale separately with wavelet, in order to search the gularity between them. Based on the summary of the center localization method, this article uses Geiger method and 4 known coordinates stations on the ground of mining area to difinite the center of origin position, and then uses the underground known point to correct distance and gives correction equation, in order to improve precision of localization. This article analyzes the relationship between mining underground and the extreme value of mine tremor, then points out their relationship and gularity, so we can control mining progress to reduces the occurrence of bigger mine tremor. Finally, this article discusses the feasibility of the applying grey system theory to forecast the extreme value of mine tremor, and uses GM(1,1) model to predict, based on the extreme value data. The author has established a grey system theory prediction procedure with the VB language.There is also some problems in the research, such as the choice of wavelet threshold value in different mine tremor wave, the practical application effect of distance correcting in the center localization.