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• W1153330400 abstract "Secondary faults are typical structures in coal seams and commonly encountered during coalfield seismic exploration. Because of the low accuracy of 3D seismic prospecting, secondary faults are partly omitted or positioned with large errors, which affects safety of coal mining, sometimes even causes serious casualties. In order to improve the positioning accuracy of secondary faults and to explore small abnormalities within the workface range, reflected channel wave observation was carried out in the 2505 working face of Yima mine, Henan province. There are 26 sources and 27 receivers in the profile with length of 390 m. The fault, roadway and rock of coal seam were imaged by the Kirchhoff integral migration and common middle point post-stack migration, and their reflection types were identified by the virtual source migration and attributes analysis. The structure and position of the faults were revealed with a length of 300 m and a distance of 40 m or 70 m between survey line and the right beginning or left end. Much rock mass in coal seam was delineated in right exploration area. The reflection channel wave observation is more accurate to detect secondary faults than the 3D seismic prospecting, and so far is the most effective method for detecting small abnormal body in coal face." @default.
• W1153330400 created "2016-06-24" @default.
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• W1153330400 date "2014-03-28" @default.
• W1153330400 modified "2023-09-27" @default.
• W1153330400 title "Fault Detection in Coal Seam by the Channel Wave Method" @default.
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• W1153330400 hasPublicationYear "2014" @default.
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