ICGCM Papers:
Fundamental Research Studies II
 
 
Passive Seismic Imaging for Determination of the Longwall Rear Abutment Location
31st International Conference on Ground Control in Mining
Passive Seismic Imaging for Determination of the Longwall Rear Abutment Location
by
Erik Westman, Virginia Tech, Blacksburg, United States
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Author's Presentation PPT
[Conference] 31st International Conference on Ground Control in Mining
[Price] Free  [Comments] 0
[Topical Area] Fundamental Research Studies II
[Author] Erik Westman, Virginia Tech, Blacksburg, United States
[Abstract] 
Problem Statement:
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Few studies have been conducted regarding the location, movement, and relative magnitude of the rear abutment of a longwall coal mine. The rear abutment, or the abutment pressure arch in the gob area, is controlled primarily by the quality of pack of the
Objective of the Paper:
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The objective of the study was to determine whether passive seismic tomography could image the location, movement, and relative magnitude of the rear abutment as the longwall face retreated, in addition to the forward abutment and gob.
Key Findings:
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The results of a passive seismic imaging study around a western US longwall show evidence for the location, movement, and relative magnitude of a rear abutment. A clear zone of highly-stressed strata is shown where the forward abutment is expected and a
Key Conclusions:
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We can conclude that passive seismic imaging can be used to identify the location, movement, and relative magnitude of the rear abutment of a longwall mine. This conclusion is dependent on the use of appropriate data collection and processing methods. T