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Geotechnical Engineering


Geophysical Technologies for Detecting Underground Coal Mine Voids:
An Interactive Forum

Locating and Characterizing Abandoned Mines Using Microgravity: Figure 3

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Two graphs.  The top is thickness vs distance the bottom is time vs distance as discussed below.

Figure 3. A 2-D geologic model (a) for simulating increasing spatial interval between the two coal seams. After convolution with a 150-Hz Ricker wavelet, the synthetic seismic response of the model (b) highlights the effects of seam separation, creating amplitude anomalies in the No. 5 coal seam reflection

Updated: 04/15/2015

United States Department of Transportation - Federal Highway Administration