Abstract：
Small structures in coal mine working face is one of the main hidden dangers of safe and efficient production in coal mine. Currently, seismic exploration is often used as the main method for detecting such structures. However, limited by the accuracy of seismic data processing and interpretation, the interpreted location of small structures is often deviated. Ground-penetrating radar (GPR) can detect small structures accurately, but the exploration depth is shallow. The combination of the two methods can improve the exploration accuracy of small structures in coal mine. Aiming at the 1226# working face of Shuguang coal mine, we propose a method of seismic-attributes based small-structure prediction error correction using GPR data. First, we extract the coherence, curvature, and dip attributes from seismic data, that are sensitive to small structures, then by considering factors such as the effective detection range of GPR and detection environment, we select two structures from the prediction results of seismic attributes for GPR detection. Finally, based on the relationship between the positions of small structures predicted by the two methods, we use statistical methods to determine the overall off set distance and azimuth of the small structures in the entire study area and use the results as a standard for correcting each structure position. The results show that the GPR data can be used to correct the horizontal position errors of small structures predicted by seismic attribute analysis. The accuracy of the prediction results is greatly improved, with the error controlled within 5 m and reduced by more than 80%. Therefore, the feasibility of the method proposed in this study is verified.
. Correction of seismic attribute-based smallstructure prediction errors using GPR data—a case study of the Shuguang Coal Mine, Shanxi*[J]. APPLIED GEOPHYSICS, 2020, 17(4): 489-500.
2020, Vol. 17 
