Research Of Mine Laneway Seismic Prediction System

Mine laneway always run into some geologic anomalous bodies such as fault and foundering post and structure fractured zone of coal and rock etc. These anomalous bodies not only directly influence tunneling efficiency, but also are master of some calamities such as mine water and gas explosion. As a result these bodies bring some galactic menace to mine safety in production. We must get some technologies that can detect these. Because prediction detection technology is a location problem about insidiousness object body. It has limited observation space and influenced by total space effect in laneway. So there are some difficulties in carrying out a fast and exact prediction technology. On the basis of some predecessor researches and lots of investigation about theory and experiment, author exploits a mine seismic prediction (MSP) technology that adequate for mine laneway tunneling.After mastering some geophysics condition of mine laneway prediction, the paper firstly get reflected wave time-distance rule about reflecting boundary around laneway. Second the paper carries out data acquisition system and some fieldwork skill for MSP. By the contrast between three layouts (point, linearity and space), the paper thinks it is a best layout for MSP that combines linearity and space layout in one. Further through some simulation research of numerical and experimental model, the paper demonstrates some apparent velocity difference between the reflecting boundary ahead of laneway face and other boundaries, and pointes out the space layout has more advantages than linear one. The space layout can obtain more multiplicity and improves imaging quality. It is remarkable that the paper has realized and validated some algorithms that adapt to process reflected Seismic data of laneway.Extracting reflected wave from total seismic record by F-K and ^Ï„-p filtering.Separating P and S wave from three-component record through polarization filtering.Reconstructing velocity model of P and S by velocity scanning and migration velocity adjustment method on the basis of assuming laneway as plumb surface model.Obtaining instantaneous attribute With the S transform.By Lots of model and field data test all these algorithms can get acceptable result.Last author exploits a data processing system of MSP2.0. The soft offers abundant preprocessing and kernel processing and imaging function for seismic data gained in mine laneway. Then man-machine interaction is convenient. Through the application of MSP in -780 south laneway of Guqiao coal mine, it is obvious that the technology can supply more geologic information and gist for those unknown anomalous bodies. So MSP technology has ability to giving some better guidance for tunneling in mine laneway.