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Seismic attribute method for concealed collapse column identification in coal fields

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Abstract

A collapse column is a geological structure formed by the dissolution of a soluble rock layer under certain hydrogeological conditions. This forms a cavity, which is filled by the overburden. Collapse columns have a great impact on coal mining safety. In this work, a model of a concealed collapse column is constructed according to its diameter, and the finite difference method is used to simulate it using an acoustic equation. The seismic record characteristics of the collapse column are analyzed. In the seismic section, the attributes of the reflected wave of the concealed collapse column in the coal seam are small and undetectable, and the reflected wave of the auxiliary horizon (the upper interface of Ordovician limestone) is in-phase axis. It is difficult to artificially identify concealed collapse columns with small diameters when twisting or dislocation occurs. However, the reflected wave properties clearly indicate an annular anomaly on the horizon property plane, which helps to identify the concealed collapse column. Finally, the seismic attributes of reflected waves at the interface between the 10# coal seam and Ordovician limestone roof in the BY mining area of TY mine are identified using high-density three-dimensional seismic data to verify the effectiveness of the proposed method in identifying concealed collapse columns.

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Acknowledgements

This work was supported by the National Key Research and Development Program “Three-dimensional Seismic Fine Exploration Technology and Equipment for Geological Anomalies” (2018YFC0807803) and the independent innovation project “New Energy and Unconventional Energy Development” (2018ZZCX05) of the China University of Mining and Technology.

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Authors and Affiliations

  1. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China

    Bin Wu, Junyu Kong & Shouhua Dong

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  1. Bin Wu
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  2. Junyu Kong
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  3. Shouhua Dong
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Correspondence to Shouhua Dong.

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Wu, B., Kong, J. & Dong, S. Seismic attribute method for concealed collapse column identification in coal fields. Acta Geod Geophys 55, 11–21 (2020). https://doi.org/10.1007/s40328-019-00278-0

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  • DOI: https://doi.org/10.1007/s40328-019-00278-0

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