## Reflection ray tracing in lignite seam model "COAL"

**Vaclav Bucha**
### Summary:

Faulted 2-D lignite seam velocity model "COAL", that represents possible
situation in lignite basin, is studied. Ray paths and travel times of
twenty specified reflected and converted P and S waves were computed
(SW3D software packages MODEL and CRT).
Four sources x1=100, 200, 300, 400 [m] located at the surface were used.
Ray quantities were computed for 126 receivers located at the surface
with interval of 4 meters. Report also compares finite difference
seismograms (PS2 scheme of
Zahradnik and Priolo, 1995)
with travel times.

Fig.1. Model "COAL".
(4 kB)

Fig.2. Example of ray paths of P-wave reflected by the fourth, the second
and the third interface (source at x=100m).
(5 kB)

NATO SfS GR-COAL project: Development of a methodology for assessing
coal reserves employing surface and borehole seismic techniques, Report 1,
Inst. of Rock Structure and Mechanics, Prague.

SW3D
- main page of consortium ** Seismic Waves in Complex 3-D Structures **.