Open Pit Mining Closure in Lusatia New Landscapes and Lakes Dr. Uta Alisch • Fugro Consult GmbH • Minex Central Asia Forum 2015

(for LMBV by P. Radke, 2007 )

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History of Lignite Mining

Lignite mining important for decades and centuries in Lusatia and Central Germany

§  1382 first discovery of lignite

§  1890 mechanised lignite mining began

§  1933 first bucket-wheel excavator was commissioned

Lignite provided >70% of the former GDR’s energy as the only real domestic source

Coal Miners around 1920

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

Open pit mine Skado around 1965 (Archive: LMBV 2002)

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Lignite Mining Districts Germany – Lusatia

Lusatian District

Central German District

Helmstedt District

Rhenish District

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

Post-mining landscape Sedlitz-Skado-Koschen (LMBV 2009)

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Lignite Mining Districts Germany – Lusatia

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Transforming and

Shaping Landscape: •  Deforested Woods,

•  Deserted Areas,

•  Removed Settlements,

•  Mining Pits and Dumps /

overburden spoil tips

LMBV

Decommissioning of former

Lignite Mines

Effects of Mining Activities

Relocation of the Emmaus-Church, build in the 13th century Heuersdorf to Borna – Distance about 12 kilometres – costs: EUR 3 million

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Remediation Requirements G

oal o

f reh

abili

tatio

n: C

reat

ion

of a

sus

tai-

nabl

e, s

ave,

and

usa

ble

land

scap

e w

ith s

elf-

adju

stin

g hy

drol

ogic

bal

ance

Creation of stable slopes

Recultivation

Reconstruction of water balance

Disposal of contaminated soil

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Problem of Lignite Mining Remediation – Soil Liquefaction

fine-grained sands between 0.09 – 1.00 mm

(VOGT;WARMBOLD 2002) Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Example of Settlement caused Slumpings

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Solutions against soil Liquefaction

Protection through construction of a hidden dam

mine dump

basement

settlement

settlement

relic lake

endangered area

„hidden“ dam

rehabilitated slope section

(VOGT;WARMBOLD 2002)

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Blasting against Soil Liquefaction

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Vibro-compaction against Soil Liquefaction

Protection through vibrocompaction

(VOGT;WARMBOLD 2002)

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

endangered tilting area

„hidden“ dam

rehabilitated slope section

relic lake

basement

mine dump

final water level

average water level

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Transforming Open Pit Mines into Lakes

Maximum water levels Schwarze Elster river Navigable sea lane Transfer channel for Neiße water Flooding pipes

to the Greifenhain Lake

from Spree river

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Acidification of Lakes caused by Lignite Mining

Transforming Open Pit Mines into Lakes

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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LMBV Bilder (Bild+Text kopieren und auf weiße Seite einfügen)

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

Bekalkungsschiff Bernsteinsee Bekalkung_Spree

Grundwasserreinigungsanlage Rainitza (LMBV,Radke 2011) Grundwasserreinigungsanlage Schwarze Pumpe (Vattenfall 2013)

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Exploration and risk analyses of environmental damages as well as design and supervision of ecological and economical clean-up procedures accompanied by innovative monitoring strategies

Brownfield redevelopment

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Groundwater flow and transport model

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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Lake District in Lusatia

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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LMBV Bilder (Bild+Text kopieren und auf weiße Seite einfügen)

Überleiter entstehen LMBV 2009

Ueberleiter_Rosendorfer-Kanal_Radke_2012-57fc5889

Ueberleiter_Sornoer_Kanal_Radke_2012-6ed405c4

Ueberleiter12_Radke_2012-835f8b2a

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

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New homes and marina at Lake Hainer in Kahnsdorf

Floating houses at Lake Geierswalder

New Recreation Areas

Source: Archive LMBV

Dr. Uta Alisch • Fugro Consult GmbH • Mine closure procedure in the Lusatian Region • Minex Central Asia Forum 2015

Source: Archive LMBV

Thanks for your attention Contact

Fugro Consult GmbH Wolfener Straße 36U D-12681 Berlin Tel: +49 (0)30 93651-301

U.Alisch@fugro.de mining@fugro.de