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Transcript of Veiko Karu Dockool Amount
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TOPIC: MINING ANDGEOTECHNOLOGY
Doctoral School of
Energy and
Geotechnology II16.06.2010
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VEIKO KARU
DEPARTMENT OF MINING
TALLINN UNIVERSITY OF TEHNOLOGY
Amount of water in
abandoned oil shale mines
depending on mining
technology in Estonia
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Introduction
Estonian Oil Shale deposit is located in
Eastern part of Estonia.
The closed oil shale mines are locatedin central part of oil shale deposit and
the area is about 176 km2.
There are nine closed mines and twoworking mines.
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Study area
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Aim of research
To calculate water amount in the mining
area.
How much water is in every mine?
How much water is in overburden of
mine?
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Methods
Main tools for analysis
amount of water in abandoned oil
shale mines is computational
modeling with spreadsheet
models
designing the water flow with
ModFlow.
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Options Kukruse Kaevandus nr 2
(Jhvi kaevandus)
Kva Kva 2 Kaevandus nr 4 Tammiku
Mine opening 1921 1949 1924 1924 1953 1951
Mine closing 1967 1973 1972 1972 1975 1999
Working time 46 24 48 48 22 48
Field area, km2
13.20 12.30 3.47 14.05 12.70 40.00
Mined field area, km2
15.33 8.57 1.84 11.87 12.73 20.46
Not mined area, km2 0.00 3.73 1.63 2.18 0.00 19.54
Height of surface, m 70.6 70.1 59.1 66.1 61.9 70
Water level in area, m 52 46.8 51.5 51.5 42.5 45
Options Sompa Kohtla Ahtme Viru Estonia
Mine opening 1948 1937 1948 1964 1972
Mine closing 1999 2001 2001
Working time 51 64 53
Field area, km2
33.60 18.30 43.30 41.70 141.10
Mined field area, km2
18.14 12.21 27.35 25.84 66.96
Not mined area, km2 15.46 6.09 15.95 15.86 74.14
Height of surface, m 62.1 51.1 63.8 70 63.4
Water level in area, m 41.8 40.7 42.2 24.6 0.6
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Oil shale underground mining
Room and pillar mining
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Pool volume is volume if all geological
seams from ground surface to bottom ofoil shale layers is extracted and it would
be full of water
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Water volume in pool is volume, which
takes into account absolute height of oilshale layers and water level
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Mine pool water volume is volume, which is
calculated by taking into account the water
content in Quaternary, limestone overburdenand oil shale layers (including a porosity,
subsidence due to natural fissures and
fissures).
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Results
Water amount in seams depends of factors:
1) porosity
2) thickness
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Water amount, mln m3 Kukruse Kaevandus nr 2
(Jhvi kaevandus)
Kva Kva 2 Kaevandus nr 4 Tammiku S
Quaternary 4.0 3.7 1.0 4.2 3.8 12.0Limestone overburden 5.3 6.2 3.1 4.9 5.7 40.0
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Results
Water amount in oil shale layer
depends of factors:
1) mining technology; 2) oil shale thickness;
3) volume of protective pillar;
4) porosity of oil shale.
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Amount of water in oil shale
extracted layer
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Mine: Kuruse Kaeandus nr
Jhi aeandus
K a K a Kaeandus nr ammi u
Amount of water, mln m3 21.3 13.2 2.5 17.0 20.7 38.9
Mine: Sompa Kohtla Ahtme Viru E Summary
Amount of water, mln m3 26.8 18.4 50.6 47.8 115.4
372.5
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Water amount
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W K k Kaevandus nr 2
(Jhvi kaevandus)
Kva Kva 2 Kaevandus nr 4 Tammiku
P l l
W l p lM p l w l
W Sompa Kohtla Ahtme Viru Estonia Summary
P l l 1 0 8
W l p l 1
M p l w l 1 4
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Design of water flow
Design of water level in closed
mine area
Design of pumping test
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Water le el
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Pumping test
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Conclusion
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The aim was to calculate amount of
water in closed mines
Using technological andhydrogeological modelling
With spreadsheet model can calculate
different amount of water in differentseams.
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THANK YOU
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