veiko karu dockool amount

8/7/2019 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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veiko karu dockool amount

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