| Coal energy occupies an important economy position in our country, But so many accidents always happened in the coal mining process. And these accidents were caused by dynamic disaster based on current research. The reason lies in the microfracture caused by mining stress or Regional Earthquake. In order to check the health of the wellbore and tunnel, This paper located the source of the micro-seismic by collecting the acceleration power signal caused by dynamic disaster. Which provide basis for making timely and effective measures during coal accident.(1) Referring to previous research results and theoretical analysis, this paper establish the Micro- seismic waves’ Propagation and attenuation rule and analyzed the commonly method during locating the source of micro-seismic;(2) Imitated rock with concrete in the laboratory, and designed two models including different strength and the same strength concrete joined injury. Then measured the dynamic response curves of both models;(3) By means of matlab programming method, wavelet analysis and fractal dimension, the dynamic response curves of two kinds of concrete model is analyzed. It can be know the regular among different working of same model of the dynamic, by comparison different working of same model of the attenuation rate of time-domain wavofor in unit time, spectrum and sperctrum of wavelet components;(4) Regarding the source location error caused by algorithm, This article repeated calculate the positioning results and obtain algorithm with the smallest error via assuming that the known observation point and source coordinates, draw minimum error algorithm to optimize the layout and observation points. And at the same time, this article optimize the layout of the observation point. |
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