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Seismic attribute method for concealed collapse column identification in coal fields

Seismic attribute method for concealed collapse column identification in coal fields 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Acta Geodaetica et Geophysica" Springer Journals

Seismic attribute method for concealed collapse column identification in coal fields

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Publisher
Springer Journals
Copyright
Copyright © Akadémiai Kiadó 2019
Subject
Earth Sciences; Geophysics/Geodesy
ISSN
2213-5812
eISSN
2213-5820
DOI
10.1007/s40328-019-00278-0
Publisher site
See Article on Publisher Site

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.

Journal

"Acta Geodaetica et Geophysica"Springer Journals

Published: Mar 12, 2020

References