1. APPLICATION OF SATELLITE RADAR INTERFEROMETRY ON THE AREAS OF UNDERGROUND EXPLOITATION OF COPPER ORE IN LGOM - POLAND
ZASTOSOWANIE SATELITARNEJ INTERFEROMETRII RADAROWEJ NA TERENACH EKSPLOATACJI RUD MIEDZI W LGOM
Artur Krawczyk Department of Mining Area's Protection, University of Mining and Metallurgy
Zbigniew Perski Department of Geological Mapping, University of Silesia

2. In the region of Legnica - Głogów Copper Region there are:
The area of research
In the region of Legnica - Głogów Copper Region there are:
7 mining areas
3 underground mines
Total mining areas occupy about 400 km2
There are 2 towns: Lubin and Polkowice, both with protection pillars
There are 2 post-flotation settling ponds

3. The mining exploitation
Mining exploitation system:
room - pillar exploitation system with the fall of roof
Size of a land subsidence:
average - from 2000 to 2600 mm (Popiołek, 1998)
Rate of the land subsidences over the fall of roof exploitation:
not exceed 1,25 mm/twenty – four hours maximal rate 2,5 mm/twenty – four hours (Ostrowski & others, 1996)

4. The method of measurment is ...
SAR (Synthetic Aperture Radar) images acquired by ERS-1 satellite (European Remote-Sensing Satellite)
The received signal, is formed into SAR image – the radarogram.
The digital SAR image contains two informations:
1. information about the power of backscattered signal - intensity
2. the phase of the received signal
In our research we are using phase information
Picture from

5. We take two radarograms Differential phase processing
Radar interferometry
After processing interferometric phase is represented on interferogram by the sets of colors called inteferometric fringes.
We take two radarograms
taken and
Differential phase processing

6. The interferogram ERS SAR Interferogram of LGOM
area presents configuration
of dynamic subsidence troughs.
The numbers presenting
the locations of identified
subsidence troughs

7. Subsidence throw 21

8. Subsidence throw 12 95

9. Conclusions
1. For the interpretation of the all area LGOM presently enough is getting 1/4 of the frame of ERS SAR image.
2. Observed 24 dynamical slopes of the subsidence troughs, which rised is directly connected with leading exploitation of the last quarter 1993 and the first quarter of 1994
3.The all observed subsidence troughs are suitable for the further interpretation.
4.The observed subsidence troughs over the exploitation area, where is used fall of roof system, during 2 month reached a maximal value approximately 110 mm/60days
5. Rate of the land subsidences over the fall of roof exploitation was 1,83 mm/twenty – four hours and didn't exceed an anticipated maximal value 2,5 mm/twenty – four hours.

10. Comparing location of two months land subsidences to survey traverses

11. Thank you for attention